I don't believe so. The best they could get you with is profiting off viacom somehow. All the items in the game are on different users account and stuff, but technically it all belongs to neopets which is part of viacom. I don't believe it's illegal as you never really steal the items off neopets. They just get taken from one part of viacom's control to another. They never leave. It's scamming which is illegal in game, but outside, it would be a tough case to make.