I don't have a hood either. Protection from dust or finger prints?
Do you cover the front of your car in case it gets stone chipped? Do you put a filter over your glasses incase the lens gets scratched?
Unless you are doing a specific activity like rallying or war journo in Afgan, then the chances of anything damaging the front element are extremely thin. If you drop your lens, its probably fubar'd anyway, so a little thin filter isnt going to save it.
...would be if I had a really expensive coffee table.The only time I would use a UV filter for protection