As for everyone’s false teeth getting chucked together in a bowl, that was something commented on in a report into abuses at Ely Hospital in Cardiff back in the 1960s. Ely Hospital was a learning disabilities hospital, and the resulting scandal from the report helped kickstart the first experiments with moving people with learning disabilities out of hospitals and into community-based supported housing.

So yeah, the false teeth thing has happened, though not quite in the way described in the urban myth.