[Jason Abbadon]

Firstly, a bunch of the anti-reg people had public identies already so it was kinda stupid for them to be upset about anything- Cap, Cloak and Dagger, Falcon, Hercules, Sue Storm....why should they give a rats ass?

Secondly, even more of those anti-eg forces had idenities known to SHIELD, so the government already had their number- Shroud, Prodigy, Coldblood, Patriot, etc. so there goes the "government cant be trusted keep their ID secret" line of reasoning.
Hell, NIck Fury had known about Thor and Spider Man for years and never let on- Tony would have done the same.

Third, when shit got real and someone (Norman Osborn) did try to access the ID database illegally, Tony ahd the whole thing set to delete- and that's exactly what happened.

SO- no reason to fight against it, after all, they clearly state that not only did the LAW pass with bipartisan support, but the people of the US were overwhelmingly for it.
NO real threat of ID's getting out existed, thanks to Tony's planning ahead.
MOST of the anti-reg forces were already in government databases anyway.

My major gripe with the story was how it depicted Captain America as both willing to defy US laws and the will of, you know, democracy, so he and his pals could break every goddamn law and hide behind a mask.

And then there's Stamford- a ton of children killed because the New Warriors were duchebags- kicking in doors and fighting villians with no pan, no backup and no regard for civillians- all of which the initiave could have prevented- hell the only logical man to train heroes would have been Cap himself, but he ws on his high horse.
Which is totally NOT what cap would have done, as anyone that read the prior twenty years of captain America could have told the writers.

What's interesting is that originally Cap and tony's roles were to have been reversed- with Tony losing everything to lead the anti-reg forces, cap reluctantly leading pro-reg forces at the government's order and Osborn taking over Stark Industries at te government's behest to make weapons.

Which would have been so much better, IMHO!