This works very effectively. The last thing they want is a vicious battle for their seats. But be resolute. Gather others who will threaten the same action of running against them and unseating them in a vicious campaign if they knuckle under to this clown. Don't let them pass it off to the town lawyer. They don't work for him, he works for them. If the POS guy says he's going to sue....let him.
Have the town teenagers make his home a target for all sorts of mischief. Toilet paper, general trash, my favorite is Ortho Groundclear
on the lawn spelling out obscenities. It will be a week to 10 days before it appears, but it will be there for a year.