Cats

Ban domestic cats (in the UK), I say. Keeping them indoors is cruel to cats; letting them out adds an unnatural predator for wildlife, and one that doesn't even usually know what to do once prey has been caught.

This New Zealander has the right idea.

I am fed up with hearing cat owners mourning the death of another wild animal or bird when the solution (or rather the problem) is staring them in the face. I am also fed up of hearing people saying their cat doesn't kill, when it is a predator and they have clearly not followed it everywhere it has gone.

There may be people (on farms for instance) for whom keeping cats is a good solution to a pest problem but mostly the cat is the problem.