I went shopping at walmart the other day and put some mtg stuff in my cart. At some point while shopping they ended up in my purse. The alarm went off when I left, but no one tried to stop me, so I just left.
I ended up getting about $37 worth of easily resellable cards if I decide to do that. I also got some cards I like a lot if I can find a place in my area to play, so it was a fun trip.