Thank you, now I know. I don't see anything wrong with just a regostry so long as the government doesn't try to control them. Of course, the government WILL try to control them, so, you know...
I may not be correct in saying this, but they want to register them(Superhero and secret identity) so that they can keep tabs on them, which in turn, would allow them to control them. I haven't read the comics so I don't know for sure, but it's just what I've heard
Read the comics online :D