I'm sure that there is a fair amount of this, especially over the holidays. I heard of one story where a 8-9 year old girl got a DVD player for X-MAS, but when she hooked it up, it started playing because there was a disk in it already. Of course, it was a porno. The trouble is that stores do not check returned items as they should. It wouldn't be a big deal if an ADULT got something like that, as it would be funny or at most, mildly irritating, but there is no room for this stuff when it comes to kids.