Certainly you may sue for this or any other ludicrous counter suit but it is doesn't mean you will win. The very act of being sued brings on some mental anguish. This is hardly a strong argument in your favor..
You can sue anyone, at anytime, for anything. All you need to do is find an attorney who will take your case.
I am sure there would be some lawyer willing to try. As long as they get their cut..
You can sue them for wearing plaid, if you like.
It doesn't mean you'll win.
No but you can vote to have taxes raised.