'Specially since the trapfinding class feature means the rogue is usually the one opening any given chest...

In fact, this is why I first multiclassed to beguiler. Our rogue makes a point of asking where everyone is in the room, to watch us squirm as we all have to admit to looking the other way while she steals all the best loot. So now I can say "Where am I? I'm standing right behind you, watching you disarm the trap! I'm new to the trap thing, and wanted to watch the master in action!"