The Bourne Conundrum

Why is it that, in the universe of The Bourne Identity and sequels, Jason Bourne’s girlfriends need to cut and dye their hair in order to go on the lam, but he makes no effort to disguise his appearance? He just wanders around looking like Matt Damon, and nobody notices him at all.

Is it double-blind reverse psychology? “The last thing they would expect is for me to go around without any disguise at all, so that’s just what I’ll do!”

Or is he using the Matt Damon thing to his advantage? Is the CIA of that world too busy waterboarding Ben Affleck to notice that there are two guys who look like that?

Or does he just kick so much ass that he doesn’t actually care if they find him?