Two points lance,
1. I am surprised to see a rule that one is not "allowed" to post private messages for all to see. I had always thought that it was more of a matter of manners, custom, etc. If somebody sends me a PM that contains nasty, vulgar, threatening, rude or obnoxious content, I will post it for all to see. I don't see why that should be a violation of the TOU. So, I'm with you on this one.
2. There are two different words that have two different meanings. These words are "than" and "then." You frequently use the word "than" when you should be using the word "then." It is kind of like the "your" and "you're" issue..... but even more so.