Just because a person has animals, doesn't mean they are loved. The point is some environments aren't made for certain animals, or people who don't care for them.
I understand about that, but sometimes it is out of temporary necessity. I know a lot of people (myself included) that lost homes due to Katrina and need temporary rentals while they are rebuilding. People with kids are having the same problem. Not enough housing close by to rebuild and tight quarters if you do find something. I think landlords are being petty in some instances.