Wow this is getting silly now.

If I tried to sue everyone that called me a scammer, conman, clown, douchebag, and a whole host of other names, I'd never have written a line of code yet!

Just take it on the chin and move on otherwise you'll never get anywhere.

Some people are immature, some people have irrational behavior, some people just like to throw bones for you to bite on because its amusing, or because they've have been scammed, or whatever other endless cocktail of reasons.  Trying to actively defend against them all is futile.

My advice is take the hit, be polite, STFU, move on!