[wizzwizz4]

Strangers are fine. It's strangers in social contexts where strangers can do harm that's the problem. An unsupervised 8-year-old on Hacker News isn't going to get groomed; an 8-year-old on Snapchat might well be.

[inigyou]

That's because on HN everyone could see the grooming and call it out - there are no direct messages or private groups.