As with Greta, at 13 I looked 18, I started going round town at 15, and was only ever asked for ID once by a new mini bouncer who was flexing his badge in front of the regulars, so we went to the other club for over 21s and never went back there. I was 16. My ex was a bus driver and took the kids to school. He then did delivering at night. Sometimes he'd see the girls he'd taken home from school a couple of hours before all dressed up for town. He was shocked by what he saw with these girls. If these girls lied, and obviously they were, he knew how easy it would be for guys to get themselves into trouble. Some of them were 13. It's easy for girls to look older than they are, and actually if you have any level of intelligence it's exceptionally easy to answer questions and hold a conversation too. Mind you, some of us weren't there for sex, so the hard part was fending off persistent guys that wouldn't take NO for an answer.
Now as to this OP, to be tricked by a photo, I understand, although I haven't checked out the profile. It may not even be her in the photo. However, for your first thought to come here and warn others to be careful as to whom they speak to, rather than the welfare of the minor, that I find odd. Regardless of her motives for being here, you are the adult. A post to warm any MOD around that you've tried to contact them on the other side, that you have concerns, and can they investigate, cool, but this, no, not so much.
I deserved better. Not than you, but from you.