I think the rules make sense and I see no reason to defy any of them.
One thing for me though, is posting a follow up on a thread where I bought something. For example, I bought a piece of ivory from Mark Knapp and Mark got it out to me incredibly fast from Alaska. I posted on his sale thread that I got it, loved it, and thanked him.
I suppose technically I should have went into the G,B,& U forum to post that, but it was simple and relevant to post it in Mark's sale thread. I know (at least personally) makers tend to look at threads like that, to see if the buyer does follow up with a little feedback. It keeps us in tune with who delivers on their word!
I've done the same thing with Mark from BurlSource many times.
The way I'm reading the rules... this very thing I'm talking about is a NO NO

If that's the case, then I can't say I'm on board with that one (not that that matters to anyone! LOL)