Making the Tetration Forum read only

[Gottfried]

I think it makes sense to continue to allow users who have been registered for a period of time (e.g., a year) to continue to post new threads, at least to push new Tetration news to readers.

This seems to be a small, meaningful step. However, I wouldn't make a big thing out of it since I know (and hate) that it is easy to ask some moderator to do some more job ... just for my fun or comfort. 5 years ago I would have just stepped in and had taken up some of the burden, but after a hard time of critical illness my mind's energy (and thus my organizational reliability) has much reduced.