I've done it at malls,its just that sometimes we don't know who's an adult and who's still in school..asian girls are like that man,those who are 16-18 years old look the same when they're 20-26 or something..And those who are over 18 dont think of us as bfs,they think of us as their kids!I've had that once,the girl acted like my mom when I called her though she was just 24.I should've known better.
At school,yeah I've done it lots of times,even if the girl has a boyfriend.Its kinda fun and gives practice,and makes the other guys look bad in front of you.All the girls I consider my potential gfs right now are where they are with me because of cold approaches.There are 6 right now,hope to increase the number though.
Nothing to be intimidated about,really.Just read the bible and articles and you'll see the light.