I'm aware of your opinion on the matter and I respect your view but you have to admit you cannot speak on behalf of ALL women, it might be the majority but not all. I know a few that wouldn't have an issue with it. Go on you tube and watch practical jokers steal kisses from women as well as film them in the process, some people are carefree and cheeky enough to get away with it as all fun and games when it is far more invasive and bordering on assault.
Do I think it is the norm? Of course not but saying a blanket no on it across the board is just not human. What if the bloke is a photographer, they not allowed to ask too?
I agree with you completely that asking a random person with no hint of trying to see that person again is creepy. But some wouldn't bat an eyelid (I'm talking about girls here). As for safety, you have probably seen Facebook, Instagram, twitter, dating apps. You can build up a far better idea of where someone lives and works and all other stuff from hundreds of photos that are enabled for everyone to see, than one random shot in public. That doesn't sound sensible to you or me but some people aren't and they just don't give a hoot.