Of course it's not legal, it's called give and take!!
I don't want other peoples shite smoke from their cancer sticks in my lungs but I have no choice, personally I don't give a shit if they die from it, it is thier choice as an adult to make.
if you want to get rid of the cats get some LION DUNG from a(local?) ZOO, this does the trick 100%, have to put some down about every six months though.
tabetha