I know for a fact that everyone that gets banned or is going to be banned has or is running something that they do not like. It's googles sandbox and if you don't play by their rules, then you get kicked out and can't play anymore.
What's puzzling is the change in attitude with google since autumn of 2009 (around sept). There must be a thread on this forum which mentions how thousands of affiliate marketers were given low quality scores. I had a site that was running for several years (since 2005). I get a low quality score, yet other sites running similar items were kept on. Must be acct execs that were supportive and those that weren't? Several years and several different act execs, some were more supportive than others.
You can promote your products but you should be very careful about CPC and it can be very expensive..