How do you deal with ex and your children with them?

I have a seven year old son from a previous relationship and am now married. My ex is constantly starting problems. He is engaged ( he's 28, has a 1 year old child with a 19 year old girl he is engaged to, been dating her since she was 15 or 16) My husband has bascially been raising my son in his place since day one. He provieds his insurance, pays for sports, school, clothes.. you name it.we pay for everything with no complaint. My ex doesnt pay support either. But spends all his time and money on the girlfriend and other child and hardly comes around. He and his teenage girlfriend have been causing us problems again. If the courts catch him not paying supprt again he goes to jail. He made the comment he might as well just sign his rights to my husband ( to get out of support, great guy huh). So now Im considering it. I was just curious what other people do with ex's who pull stuff like this b/c Im really bothered and trying to find a way to keep things civil but these people are so childish.How do you deal with ex and your children with them?
I'd say you basically answered your own question. If he's not there, and not help supporting him, then why let him have any rights? Especially if he's more than willing to do so. Do whats best for your son. If he already looks up to your now husband, as daddy, might as well make it complete. That's what I would do. Good luck.How do you deal with ex and your children with them?
Have you considered the idea of your husband adopting your son? Your ex would then have very few rights and would hopefully stop causing the problems. The decision must to adopt must be discussed with your son as well though. Does he see much of his Father, and are they close?