I think at least in the forum around here, you can relie on the mods to prevent any "creepers" sneaking up on the kids forum. So a typical sign of Aspergers is too mature a bit slower, so its not unusual here in this forum to have lots of so called adults, that still have tons of interests normal people would consider to be "childish". (I can offer computer games, Star Wars, Dungeons and Dragons-games, midiage-markets, .... XD ) So when its about topics of certain hobbies, its not unusual that people discuss with each other about Pokemons or whatever, without caring about age.
But most poster know each other pretty well, so I think a new poster, that focused only to post on the kids forum, would become suspicious after a certain time. As well that I think most here know from expierences in their own life, how bad it can be, if someone tries to benefit from the typical Aspergers being more "clueless/innocent", so it hardly will be accepted here. In general I think the real important think is 1401bs advice about talking to your kid, to never give away personal informations. No photographs, telephone number, real names, ... so if you whyever have a facebook account with your true name, that means as well not to give away your facebook-link. ^^
Dont scare your kid of the internet, but make it aware, that its nothing else like real life. Most person are ok, sadly some few are bad ones you need to be aware of. Make your kid aware, that giving away your personal data in the internet is similar to giving someone a key to your house. A sign that someone is not ok, is if they insist to get your personal data. Normal internet users understand, that you dont give away personal data, and do so as well on their own.
If you create an account on wrongplanet for your kid, you can as well use your own Email adress for it. If you activate it, then you will receive an information if your kids receives an private message, which will not be automatically observed by the forum moderators. So your kid has the possibility to message with other kids, if he/she wants, but you can check every now and then, if everythings alright.
Really? I matured faster. I thought that was an asperger trait. Maybe it's just that I'm as old as time and the diagnosis process sucks? Who knows?