Ask him what "one of your sort" means.
We can all lump others into "sorts" and then demand they are banned because an accident might happen. Him and his car for instance, or his lawn mower. Buy a sheep and let me sleep on a sunday morning, before he tries to cut off his toes or electrocute himself!
The problem with GA is that it in this country it still has a vestige of eletism attached to it. I was walking through a marina a few months back and a perfectly harmless bloke was walking all his gear back to his car. The moronic couple infront of me looked back and sneared and commented who does he think he is, and they don't like his sort!
Their problem is that he hasn't surrendered to mediocrity, spending his life watching soaps etc.
Tell your neighbour the C150 wasn't doing anything illegal and can stay there as long as he doesn't brake rule 5 etc