Personally for me it depends on the context. I do a lot of photography in political demonstrations, and during such events I consider it fair game to photograph anyone as the press is also there and no one in their right mind should expect to go there and not get photographed. So by going, they are giving their implicit consent imo, unless they specifically state otherwise to me.
That being said, photographing people on the street as they just walk by or use public infrastructure like transportation is creepy in my book. People have to go to work and out to the street, so even if they don't want to be photographed, they will be in public places and you can't assume they will agree to you photographing them. So unless they give you explicit consent or you make it so their faces isn't recognisable, I don't think it's alright, no.
TL,Dr; Photography at Public Events yes, photography of random people on the street no.
Personally for me it depends on the context. I do a lot of photography in political demonstrations, and during such events I consider it fair game to photograph anyone as the press is also there and no one in their right mind should expect to go there and not get photographed. So by going, they are giving their implicit consent imo, unless they specifically state otherwise to me.
That being said, photographing people on the street as they just walk by or use public infrastructure like transportation is creepy in my book. People have to go to work and out to the street, so even if they don't want to be photographed, they will be in public places and you can't assume they will agree to you photographing them. So unless they give you explicit consent or you make it so their faces isn't recognisable, I don't think it's alright, no.
TL,Dr; Photography at Public Events yes, photography of random people on the street no.