(1) Superheros cause a lot of collateral damage, and they don’t want to be billed for it.
Its not like they can just send a bill to batman/supermans house.
They can send a bill to Bruce Wayne – that man’s friggin loaded. He was Bruce Wayne before Batman, you know. Clark Kent was also raised by the Kents as Clark BEFORE he took on the Superman mantle. They can also place either under arrest for mayhem
(2) Technically, they’re vigilantes – that’s illegal.
same as above
same as above
(3) Much like CIA agent or high government official…they put their families and loved ones at risk. If they have a completely private life, that doesn’t happen.
again if they dont lead that normal civillian life I dont see how anyone would know
Those who don’t, then wouldn’t have a secret identity.
(4) Escaping the paparazzi (plus evildoers, for a short time). Doesn’t Britney Spears wish she had a secret identity, you think? ;-)
Fortress of solitude, batcave etc
They aren’t allowed to go out for lunch, ever? They can’t have a friend, ever? See a movie ever? Again, if they don’t want a civilian life, they don’t need a secret identity – but how much would THAT suck.
(5) They can avoid government demands for technology that is outside the government’s understanding – consider the hearings in Iron Man 2, when Tony Stark revealed his identity.
Again I didnt so much mean why they wear the costume but why have the civilian life. Like why cant Superman just be that. Why even make up clark?
This addresses some of the aspects of attempting to have a civilian life that are shared by both celebrities and superheroes. It’s not _the reason why, but a reason why it makes it easier to have them._
(6) Superheroes have lairs. Sometimes, they might also want apartments.
....why? Why in the fuck would you want an apt if you had the mother fuckin batcave?
Because…friends can’t come to your batcave like they can to your apartment?
(7) They don’t want their wives or husbands to worry while their out.
most arent married, those that are know.
Extend it to the loved ones generally…
(8) That costume needs to get dry cleaned sometime.
and teh reason for not having more than one is?
Those things are expensive, dude!
The honest, real reason why this happens is, of course, that superheroes that have secret identities, generally, gained powers or had the public identity of the non-powered individual prior to revealing the super-powered identity to the public. Superman didn’t make up Clark Kent – he was Clark Kent, and in essence, “made up” Superman. Same thing for Spiderman – he was Peter Parker. They had lives and formed bonds before taking on the superhero mantel, and want to protect those lives from invasions from elements of their new, superhero lives.