Living as a vigilante is not exactly living a normal life now is it. The entire point of this version of Civil War is because these people need to be held accounted for their actions. Yes, they saved lives in Sokovia but the fact remains that an entire European city was lifted into the air. A government organization was taken over by Nazis and giant warships rained down on the nation's capitol. Aliens attacked a major metropolitan area and true innocent people died. A green beast went on a rampage in a city. That same green beast had a damn brawl with another beast in a different city. Ant Man jeopardized his own innocent family and an equally as innocent neighborhood, and this was after he caused an entire company to implode or whatever. 

Heroes are not above the law just because they have super powers. They should be held accountable for their actions. I don't watch AoS and Daredevil was eh but those people aren't immune just because they're not in the big leagues. Jessica Jones already causes problems by hiding shit from her friends and Purple Man is going to find out shit about you regardless of any accord. Any villain these people come up against are going to do so regardless of whether or not the public knows who they are. A damn teenager is on the side of the accords and if he can see the reason behind it, why the hell can't Cap? Because he still believes in the America he left behind. He's still living in the past. 

Just look at the lineup on Team Cap. NONE OF THEM ARE CONCEALING THEIR IDENTITIES. It's public record who and what Cap is, Falcon is just straight up using military tech, Scarlet Witch is not wearing a mask and Wanda Maximoff is not exactly a common name, Scott's already got his family involved but at least he wears a damn mask. The whole 'knowing who the people are' thing doesn't exactly hold water when half of the big names are already basically flaunting their identities anyway.