It's just a hunch, but I think here in the US, it's more likely that if a kid tried that, he'd come to his parents' house to find all that junk had been sold or given away. I was shocked when my mom did that. I'd come home, "where did the piano go?" "Oh, I donated it to a community center. They needed one." They wait till you go off to college, then quietly reclaim the house as their own.
The proverbial example is the baseball cards which would have been worth a fortune, if mom hadn't gone on a clutter-removal frenzy.