The issue with kids is a constant topic on the FB Quest groups.

I agree, it really can ruin most multi-player games.

Second Life used to have a similar issue iirc, until they created dedicated world for them.

The groups are also littered with parents asking about games for their kids (often less than FB's minimum age too).

FB really needs to address this issue, for the experiences (like ours) of the adults. And also the protection of the children.