PETA repeatedly oppose killing rats, they suggest live trapping and releasing in the countryside, which could well be someoen else's land, so the urban pinko liberal hygiene problem becomes someone else's problem. In the UK it is a criminal offence to do this, but no one has prosecuted PETA yet for incitement.
Biologist Plummer says categorically that there is no such thing as a clean rat. They are carriers of several diseases, some of them fatal to humans and other mammals. In addition they are mechanically destructive. So there is no such thing as a clean or healthy rat. Rather than administer drugs and all that baloney it is much easier to squash it.
I have no problem with guilt. I detest others trying to use it to manipulate. Intellectuals like Woody Allen have commented on this, and attribute it to a certain religion, or group of religions. As a pure Hellene I do not feel bound by these religious precepts and the false ethics they spawned.