I can testify to that. I do like cats, but to be honest I'm not chuffed when I see my neighbours cats using my garden rather than their own (further from their home territory I guess) as their litter tray. I used to use that garden area for BBQs in the summer, but can't really justify having guests standing or sitting on the 70% of the lawn that seems to be affected. Of course there's nothing I can do about it, so I don't complain. But it does irritate me mightily.

Sorry, didn't mean this to become a thread hijack or degenerate into a discussion of the toilet habits of cats - it's just that the garden as a litterbox comment hit a nerve.