Not really AIBU but just feel so guilty.
I was waiting for a bus to take me to my hospital appointment (unavoidable even due to Covid) and there was a young girl in the shelter with me. She was far enough away from me I wasn't too worried. She randomly asked me if it's okay to meet someone online. I was quite aghast at this. I said no she's really too young. She told me she was 9 and was I sure? I said yes it's not ok and she should tell an adult if someone is trying to meet her. She just laughed and it made me feel sick to my stomach.
She asked me if I had met anyone online and I didn't know what to say, because I have met loads of people online but I'm nearly 30, I do look a lot younger and I was wearing my mask so I who knows how old she thought I was. Before I even opened my mouth, she was away on her scooter yelling "Bye" and zooming along the pavement! I haven't been able to stop thinking about her. I don't know her name and I didn't even really look at her for more than a few seconds. I'll probably never see her again. But my main worry is she being groomed online?
I know there's nothing I can do but I feel so helpless. I wish I'd asked her more instead of answering her question I guess.