Could I get into trouble legally if I took out a personal add?

Well truth is a defense for a libel lawsuit.

Why waist the money, spend it on your kid instead.

You could do it, and with the correct verbiage you could prevent legal action. All you would be doing though is venting in an open forum. What does that help?

Instead, why not be pro-active and legally have him give up all rights to his child. He obviously doesn't appreciate having them anyway. At least he would be gone, and the truth would be out in the open. And remember to tell your child that "making a baby" and "being a father" are two very different things.

Are you in his head? Can you count how many times he has thought about his son, and are you prepared to testify to that under oath?

OK now that you have that out of the way...

Maybe he sees staying away from his son as the lesser of two evils - we don't really know him here, but we know what you posted, and it is clearly bitter, angry, and vengeful, and you wish to be able to shame him even from far away.

Can we blame him if he wants to stay away from you enough even if it means sacrificing time with his (and your!) son?

Fortunately there is help available for you - I am sure many therapists will be glad to assist you get rid of the anger and fury and get your life back on track, for the sake of your son!

Even the truth can qualify as "Defamation of Character"...You wouldn't be in trouble with the police, but could be facing a civil court if you're not careful

Slander and libel are lies.

Get your emotions in check. Stop thinking about revenge or desperate measures. Seek legal advice, not some silly newspaper game.

I'm not sure of the legal side, but no matter how mature you think your being you have to think about how mature he's going to be when he reacts.

That is defilement of character and yes, he can sue you for it. You are better useing the court system to your advantage and continue to harass him through them to get help.