I went to a “libertarian family website” and noticed that a lot of posts had to do with things like ‘when does it stop being okay to sleep nude with the kids’?
seriously.
The answer was: when one of them objects.
The same site stated its beliefs that children are just like adults and have the same rights to sex and drinking and drugs and porn at ANY AGE. In other words, anything goes-including incest.
It looked like an abandoned website, I found a few like it, but they apparently have gone deeper underground.