>>3123346Generally I'll just try to remain inconspicuous while I take the actual shots, then approach them and ask if it's alright if I Take photos of them. Most of the people I like to snap are young women who are more than happy to take photos (though the ones I take after asking are almost always utter shit, pic related.)
However if they notice me I'll approach them to apologize and show them the photos. If they're good, they're usually OK with it, and if they're bad, I was probably going to delete them anyway. Even if I really like them if they ask me to I'll delete them there and then. (They don't have to know I can recover lost files off my SD card.)