U see a woman waiting/standing .. then u go near to peek at her hp see whether she is playing pokemon... even if u see her fingers tap tap at her hp, she may be playing other games and not pokemon, so u have to go near her and try to peek at her hp.
Then she thinks u are pervert or what trying to get fleshy with her and u end up in social media labelled as a potential molester etc..
Ninantic should have randomly allocate stranger nearby to fight with u.. just like how strangers are able to join in a gym fight or raid..
Imagine having to scan QR codes of each other before u can join in raid or fight in a gym, I think no one will bother to play pokemon go liao