My DD is 9 and in year 4. A couple of nights ago she had real difficulty getting to sleep, she got really upset and admitted that some of her friends had been telling her scary stories and about horror characters - she mentioned Cartoon Cat, Jeff the Killer, Smile Dog and Sirenhead specifically. I was aware of these already but while I am sure there are kids who just find this stuff funny, they're evidently aimed at teenagers/adults.
It's a couple of kids specifically who are talking about this, this is not the first time one of them has freaked her out, as she has previous form for showing my DD videos about Slenderman on a playdate when they were 8 - it appeared her parents didn't monitor their DD's internet use at all. I am not cross with the kids, that's just what kids do, but I am cross with the parents as I strongly suspect they don't really know what their kids do online.I monitor the content of any media I let my DD access pretty closely and while I have occasionally allowed her to access, say, games that have age ratings higher than her age, I have always done so after vetting them myself for suitability. She is actually much less easily scared by stuff like this than I would have been, and I lapped up ghost story books at that age, but she has a vivid imagination and some of the stuff they told her was pretty freaky.
Would I be unreasonable to mention this to her school? I don't necessarily expect them to do anything about it or say anything to the parents of these kids, but do hear a lot of stuff from my daughter about a few of her classmates playing specific games or talking about specific characters that to my mind are not age appropriate, and get the distinct impression that many of the parents aren't really aware of it. But by the same token, the school have previously overreacted a little (IMO) to technology scare stories (ie Momo, Roblox etc) so I am not entirely confident that they wouldn't overreact again. Any advice?