How could anyone be so cruel?!

I am FUMING right now, as a man who owns a shop a few doors down from us has threatened to poison my cats if I don't get rid of them, because he hates them going to the toilet in his garden (which is neglected). I am so cross, I can't believe he is trying to make me give them away, I have had them for years! One of them is a rescue cat and there is no way I am letting some prick kill him!! I am ringing the RSPCA and the police today to report it, because its illegal to put poison down, and its definitely illegal to kill a cat on purpose, and if he does it, I will sue him and take him to court (which I can actually do by law), I just hope it doesn't come to that! :(

Socks my Rescue cat

Muffin :)