@lightbitbandito long ago as part of a study, an inquiry got ASL-using individuals to show what word would work as group-ID; "soundproof" is, in my opinion, most satisfying, and also, luckily, fits our constraint. thanks!
Mastodon is a "FOSS" social sharing hub. A multi-host substitution for capitalistic platforms, it avoids risking a particular company monopolizing your communication. Pick a host that you trust — you can still talk with all hosts running Mastadon. Any individual can run a Mastodon instantiation and join in this social hub in a jiffy.