have namechanged for this as dd1 knows I post on mumsnet
dd1(17) and her friend have become increasingly concerned about what another friend(lets call him Dave) also 17 has been posting online, for the background Dave has aspergers and really struggles with all social aspects(before anyone kicks off so does dd1) and well he wasat the bootom of the bottom set at school.
He now has a following on tiktok/instagram etc many of whom seem to be young girls(9/10/11/12) and dd1 is getting concerned about the tone of comments he is posting on their messages, photos etc. He also seems to have become obsessed witha family on instagram, particularly their 2 daughters. She has shown me some of the comments and posts and if you didn't know Dave they could easily be seen as creepy/alnost paediophilic.
We're concerned that he is going to get himself in trouble but don't know what to do, he probably wouldn't understand if they tried to speak to him, his parents aren't very approachable and he no longer goes to school/college. Dd1 suggested speaking to his uncle who's a police officer but I don't know if that would be a good idea.