Since we are planning a talkgroup, we can answer the questions at the beginning! 
I would like to auto-unlist, possibly auto-delete posts from this talkgroup.
My reasoning: folks might forget about this and it could continue to give incorrect info. If everyone knows at the beginning it will disappear, they can set an auto-timer or something on it, to either reset the thing, or to post a new one. Knowing you will have a profile that disappears is cool.
Thoughts?
Aside from auto-removing posts, I don’t think this requires anything special. We want it to be open, and we can explain it is for having self-removing profiles up, and not really a discussion place… unless we want it to be that. In which case we could also make auto-deleting replies!
I’m into deleting right now.
I’d say yes. If one wants to be on the welcome wagon, they can sub to the talkgroup. For folks just stopping by I don’t think other users introducing themselves is the kind of messages we want to show.