Sorry I have a boyfriend alternative
Apparently, "I am a minor" is the new "Sorry, I have a boyfriend" card. It allows you to reject someone without actually rejecting them. Now, boys can't even be persistent or accuse you of lying. If she says she's a minor, you can’t stay there any longer, and "we can be friends" doesn’t work either.
My friend used this method when we were standing in front of a coffee shop, and a guy approached her. Believe me, this method works much better than the old one. However, it wouldn’t work for an adult who clearly looks like they’re in their 30s.