what websites have excellent "come backs" and insults?

Answer 1

I don't think you are a fool after reading your post, but what's my opinion compared to that of thousands of others? You could type every thing you know on the subject on back of a microscopic postage stamp and still have room leftover for a shopping list. Oh well, at least you only charge what your free advice is worth. As Abba Eban so aptly said: "His ignorance is encyclopedic."
http://www.insultmonger.com/generators/auto-flamer.htm

"She not only kept her lovely figure, she's added so much to it." ~~Bob Fosse
http://www.insultmonger.com/generators/quotemonger.htm

"Thou dissembling knotty-pated clotpole!"
http://www.pangloss.com/seidel/Shaker/

Answer 2

Yo mama!