I don't know why everyone is getting their panties in a bunch over the so called "thread crapping".
1. It's been going on forever on these boards, or at least since 2006. (don't make me search for examples)
2. The old adage, "any press is good press" (no pun intended) holds true here as it does anywhere.
3. No matter what is said in a sales thread, if you have the books, they will sell.
4. No matter what is said in a sales thread, if you have a quality reputation on these boards, your books will sell.
Advice, don't make an open message board part of your business model if your worried that now and again you are going to get some comments/personalities/opinions you don't like.