No, there is no way. Yes it is hard to tell if it's ai. But humans play different. And also this is why anticheats exist.

> If children want to play together with their friends, isn't it much better to spin them a Minecraft server or such for friends they know from real life instead of playing games limiting them by "very narrowly specific interactions" anyway?

compared to roblox, sure. who would even argue against that?

but there are many games where it really don't matter. it's probably most games... car racing sim... football sim... strategy like civilization...