I can't really speak for anyone else, but I come here to engage with friends/discuss a variety of topics, as it's not always physically viable for me to explore that offline, save of course, for my closest friend, who lives nearby.
Discussions here can involve many different emotionally charged issues, including family dynamics & relationships. I wouldn't say that discussing those things candidly with others to gather a sample of outside perspective, or seeking support when needed is necessarily 'hiding' from one's parents. That kind of seems like saying 'talking with friends or in a support group is hiding from one's parents,' which doesn't sound accurate, to me. This is of course, assuming we are dealing with our issues head-on offline, in tandem.
I don't see too many people here simply talking about those things to escape or hide from their parental relationship issues. Usually they seem to be seeking what I tend to seek. Emotional support, or just to be heard. And assistance in gathering the courage to face any issues they have head-on. In that context, this forum can be quite helpful, I think.
At least in my case, it has been (in tandem with IRL therapy & support from friends). One parent is dead. The other is mentally ill & repeatedly tells me she wishes I were dead or otherwise attempts to psychologically degrade me. She has on occasion, also physically attacked me. Of course I'm going to limit my exposure to that kind of abuse. And of course I'm going to seek support from multiple sources - both casual & professional.
As for grooming practices, the mods are pretty sharp. I'd like to think they'd take notice of any insidious attempts at a young person being taken advantage of, here.