Ok, so then it seems a pretty obvious infringement upon their rights if registration is mandatory. It might be one people think it worth it but it's an infringement nevertheless.
If I recall correctly, registration "is" (in the fictional Marvel World) only mandatory if you want to be a super hero. You had the option to retire if you have powers, or register if you wanted to use them. If you were not registered & used them in a public capacity, you were in violation of the Registration Act & the Tony Stark lead S.H.I.E.L.D (And now currently the Norman Osbourne run H.A.M.M.E.R.) would Party Van you. If you further refused to register, you got sent to prison.
It's kinda like registering a gun. If you use one in public it needs to be registered. If you simply own one & don't use it in public, it's kinda hard for the authorities to arrest you for an unregistered one.
Mutants weren't really factored in as the government had, at the time, tabs on the 198 that were left.
Cap had a real issue with this mostly because, back in his Nomad days, he had a real problem following the orders of some corrupt people. Government run Super Heroes post registration wasn't something he wanted to see abused again. Well, until their battle made a mess & hurt some folks causing Cap to surrender.
Then be "assassinated."
Which didn't actually happen. He was shot & put into suspended animation while being simultaneously unstuck in time, like Desmond on Lost, by the Red Skull who himself was "dead" but in the head of some other dude looking to transfer his consciousness into Cap's body.
Oh and Bucky's not dead, he's the New Captain America.
So there's two. Edited, Mar 9th 2010 1:20pm by Omegavegeta