If it's on a PC or laptop, you'd need to porforward regardless in order to make it publicly accessible.. You can use the IP of your router to connect to the domain but you'd still need to portforward...
Ok,
I'm gonna say my simple opinion.. Yes internet bullying is illegal, but so are retros..
Honestly, if you think the retro has a "fucked up staff/moderation team" then don't play the retro? Find a different retro.. Lets get real, majority of retro people are assholes. Not all, but majority...