The apartment complex I live in has a very cosmopolitan feel to it.  We've got lots of grad students (which around here means lots of foreign students), seniors, young singles, young couples, young familes, working class folks, affluent folks, etc.  It's a good mix and I really like the community.

However, a non-trivial fraction of the people who live here lack basic life skills.

I first realized that when they gave us our move-in packet, which included a bunch of sheets of instructions, telling us not to do really appalling things that we would never consider:  don't flush aerosol cans down the toilet; don't run kitty litter through the disposall; don't turn the heat down so low the pipes freeze....  There was quite a list.  If I hadn't been so amused, I might have felt insulted.  But, the fact was, people who lived here had done every one of those things before it went on the list.

All that is preable to this:  The opinion among landlords is that section-8 tenants are particularly likely to suffer from this sort of deficit in life skills.  I don't know if that's true--obviously plenty of people using section-8 vouchers have average-or-higher life skills--but that's the perception, and it's the reason that they recommend against new landlords renting to them at the outset.