A "friend" on Facebook is making me VERY mad. Is revenge worth it in this case?

It is said that the best revenge is to move on and to live a good life. But if you are hell bent on exacting revenge, it's always best to kill them with kindness, Seriously, the nicer you are the worse they will feel for treating you poorly. Sending a nasty e-mail then deleting him and blocking him from sending a response is childish and quite frankly lame. Because when all is said and done regardless if you got the last word in or not, HE is the one who got the best of YOU. You are the one who is upset. He isn't. So again, in this case moving on and looking for your own happiness instead of trying to be the cause of another one's sadness is the only way to win. Overall, Grow up kid! You are in the real world now, leave the grade school type drama in grade school and on the playground.