They do now & again. It seems to go through phases though.
Presume they're always on the look-out in general & do manage to catch out a very small % every day, but a few months ago they seemed to be `targeting` certain sellers, panom0z was certainly mentioned at the time. Maybe once the level of interest by purchasers from certain sellers reaches a certain point, the sellers `details` get flagged up?
Also individuals reporting concerns to HMRC & maybe even the logistics companies themselves have legal requirements of notification, especially if they suspect anything dodgy?
Who remembers procamerash0p

or even BIG Norman