Will say this, though. If you need for an item that isn't for your class, but was needed by a guy with that class who's in the group, I'd agree to kick you. That's a major no-no.
I'd agree with one caveat: Now that BoP items are tradeable I'd overlook the trespass with a stern warning if the offender immediately returned the item to other player. A refusal would get a /kick and an /ignore.