These questions don't affront us at all! On the contrary, we appreciate your initiation of vigorous debate on any and all subjects related to this field. We spent considerable time refurbishing our discussion forums so they would be used and there have been interesting discussions here recently. Given this, I'm not sure why you would you think we, the staff, would be interested in discouraging discussion. We re-post shows like YOU_ser to provoke awareness as well as critique and analysis. As I see it, they all go hand in hand.
In regards to your other question: the current staff does not, by policy, remove emails from the TextBase. We're proud of Rhizome's history and the critical, wild discussions that have taken place here. We did make an exception recently for a former member who was painfully embaressed by an email and asked that it be removed..