Paul, please understand I am not deliberately trying to argue with you and I apologise if I have come across in that way. I am just trying to answer the original question as completely as I can. But I must insist that the notion that hobbies don't cost is nonsense - of course there is a cost associated with casual photography, quite simply because you are using the camera and IT equipment you have bought and you may have specifically travelled to that location which incurs another cost, and there are likely to be other outgoings as well. In other words, the purpose of which the outlay came about really is irrelevant, the point is that the outlay exists, the nature of your outing is absolutely irrelevant to your fixed costs. Nor does it matter in the slightest that you would be there anyway - the fact is that you are there, using your kit, taking time to capture your photographs, and you are then doing something further when you return home. So you can work out what your hobby is costing you, which is something a lot of people do before embarking on something. At that point what you intend to do with the results doesn't come into it - they have still cost you something to produce.
I'm afraid I no longer have any hobbies thanks to my job as a photographer, but I did in the past, and they did cost me quite a lot at times. They were for pleasure, and one of my hobbies involved keeping a horse. I did quite well and I used to enter three-day event competitions. I did it for my own pleasure and satisfaction and I knew what it cost me each time I competed. A couple of times I was approached by organisations who felt I could help enhance their profile (which might be a feed product or something similar) and I was asked if I would ride the odd event for them (with their logo etc). I would have riden those events anyway but since I was promoting an organisation it would have been inconceivable for me to boost their companies profits for nothing. Why? Because I am not a charity and I deserve something for my abilities, and the fact my presence and input is costing me. The 'already there' argument doesn't work in my eyes Paul - somebody is wanting to use the fact I have expended money and talent to get into that competition and I am doing something which could potentially benefit their profile.
In my view if I had done that for nothing then I would have seen myself as being gullible, and I would certainly have felt that I was being used. Which is why I made sure I was paid. The fact that you feel differently is of course you're right, but I genuinely don't understand why you want to subsidise strangers. I don't mean that in a rude way, I assure you, it's just hard for me to understand how a good photographer such as yourself would do that, particularly when you know that it's having an effect on the other photographers who are also present, and who you may even know personally. Once again I'm very sorry if I sound unpleasant, that is not my intention, and I do of course accept that we are all different.
Lastly, no I have not used other people's equipment to make money for myself, I have always given them something in return. As for being a hypocrite as you suggest for using advice on the web, my own blog is a very rich source of free information and instruction for new and professional photographers alike. I do my best to give back where I can, but I have a threshold beyond which I cannot tred for the reasons already set out. I do hope that clarifies things. Incidentally, if I have used software which has an optional payment button, I have always made a donation to the creator.
Lindsey,
Don't worry, I take nothing personal here, it's a discussion that's all.
I do accept that the photography hobby does have a cost, of course it does, but you need to look at it from an amateurs point of view and not that of a professional.
If I were to divide the cost of my equipment, including IT which is not used solely for photography, by all the images it has produced (even just the decent ones

) the cost of 1 image would be pennies if that.
Most amateurs combine their photography hobby with another aspect of life they enjoy. Most landscape photographers enjoy being outside in the countryside, sports photographers usually like the sport they are shooting etc.
My equipment for my hobby have a substantial cost attached to them but it's a cost I am happy to pay with no expectation of recouping any of that cost. The 'payment' I and other amateurs receive is the pleasure of the hobby.
I have never left my house thinking this is going to cost me £x to get these images and how could I recoup some of that money, I simply leave the house with my camera to enjoy my hobby, oh and often enjoy watching others do theirs in the form of motorsport.
I have never given an image from a major event, but I have form the more grass roots level, especially the driver who made the most spectacular pit entry I have ever seen, full tail wagging then 360 spin! he wasn't aiming for the pits at the time but that's were he ended up within inches of the armco
Other hobbies are the same, your horse riding included. I used to race 10th scale radio control cars. Probably not as expensive as a horse but certainly not cheap when the chassis alone cost around £300 and the consumables weren't cheap either. Again I was happy to pay for the cost of the hobby with the reward the enjoyment of racing.
If someone wanted to use one of my images commercially then in all honesty I can not be bothered with the whole tax thing and I already do a Self Assessment every year. I would and have in the past asked for a donation to the Scouts, ok it's easier for me and no doubt the business can wright the donation off against their tax so costs them less but that's my choice.
Everyone has their own view on things and that's fine with me.
As to op question of who is to blame. I don't think anyone in particular is to blame, things change. If I was to try and pin point a source of the issue then maybe the explosion of the internet has something to do with it, more so with high speed broadband. I personally buy maybe one or two magazines a year and that's only if I'm going away on a course where I know I'll be in hotel on my own. I read all the news etc online - it's more up to date for a start.