I want to make a portfolio of strangers at random places doing everyday things... I read that it isn't illegal to photograph strangers without permission (although I plan on actually asking for some shoots that I want), but how do I deal with that? What I mean is that... if I was for example, at a restaurant and I want to take pics of a person sitting across me but if I just start talking pics, she/he might be all creeped out, but then if I ask for permission, it takes out all the 'natural everyday emotions' ?