I can't answer for the above poster, but I can say I would much rather my kid call me than tell a stranger his/her last name. Kids are much more manipulable th

I can't answer for the above poster, but I can say I would much rather my kid call me than tell a stranger his/her last name. Kids are much more manipulable than adults, and giving out identity information might be dangerous. I'd instruct my kid to call me if another adult insists on identification. I think this is age-dependent. If I trust my kid with a cell phone, then this is reasonable. If the kid is too young, and it's a school incident or something, then sure, it's reasonable to tell a teacher or school administrator your last name. Some rando in the park, though? No.