Hep
Striker
No they are not within their right to take whatever steps they deem necessary, anything which causes harm to the cat is illegal.Okay. Point accepted.
You therefore have to accept that people who do not want your cat 'roaming' in their garden are well within their rights to take whatever steps they deem necessary to stop it.
You may not like the methods they choose but you have created the situation and forced their hand by keeping a pet that cannot be controlled.
My point is why are people that bothered, cats bury their shit. It's under the ground covered with soil. Unless you're playing with the soil which is already pretty much pure bacteria it shouldn't be a problem.