Idea:
The presence of super heavy items items at a location increases the locations % hide chance (slightly)
Caveat:
When a heavy lifter lifts a super heavy item in the location, it has a (quite small) chance to unhide someone at that location (for the first lift only).
I think it would be a delightful surprise to find someone braced to the underside of that couch or wedged in a jukebox or sleeping in the car you are about to throw. Ideally, not enough of a chance to make IB's the new huntermeta class, but enough to come up once in a while for a chuckle.