Rengar, I’ll answer all four points at once!
There’s a great program called Hamachi! You can create a shared network there, with a password if you want. Post the network name and password on the forum with invitations to “chat.” And let them sit there as long as they want. I often do this myself to chat with friends! But posting something like that on the forum is asking for trouble! And the fact that everyone considers it their duty to write some nonsense on the forum and put it on public display, I can only call it stupid infantilism!
Then you really should turn all forums into a book, and on the forum itself, where there should be topic titles, write in large letters: “YOU WILL FIND ALL THE ANSWERS TO YOUR QUESTIONS IN THIS VOLUME” and a little lower, in a smaller font: If you have a new idea, let us know, we will add it to this booklet.
What? It’s good, you won’t have to moderate, and you’ll save money in the current crisis, and people won’t be too offended, they’ll just go to other sites... Is that what you want?
And regarding Hamachi, if I’m not mistaken, there:
1) the IP address is displayed, shamelessly;
and 2) you have to invite people there, and many won’t go, because everything new is scary. And it takes time to gather enough people there.