I got off a crowded BTS some 10-12 years ago. I had been standing in the space just to the side of the door. There was an Indian/Pakistani-looking guy standing uncomfortably close to me, with his back to the door.
I exited and, the next time I used my wallet, noticed a slit in the leather. I checked my pants and the pocket was slit in the same location, obviously done with a razor-sharp blade. Fortunately, I didn't lose anything.
Still using the same wallet!