Sorry, I accidently only had codecatacombs marked readonly. Fixed now, and it looks like nobody took advantage of the overpermissiveness. All groups except perlmonks.nntpdiscuss are now returned as readonly by list.
It looks like nobody actualy attempted to post anything, and even if they had, it wouldn't have ended up on perlmonks -- the code for that isn't written yet. Instead, it would have just cluttered up the GW NNTP server.
Warning: Unless otherwise stated, code is untested. Do not use without understanding. Code is posted in the hopes it is useful, but without warranty. All copyrights are relinquished into the public domain unless otherwise stated. I am not an angel. I am capable of error, and err on a fairly regular basis. If I made a mistake, please let me know (such as by replying to this node).