I find the process of out-right deleting threads to be disrespectful to forum users. People invest time, often significant, into responding to threads. When a thread is summarily deleted, that time is essentially stolen from them. I don't consider that a customer friendly process. I can certainly see closing threads for further comments when they get too far off track or deleting offensive posts, but deleting a whole thread punishes the users. I would also suggest much clearer rules / guidelines on acceptable topics. People are more accepting of rules, even if they don't agree with them if they are clear, and consistent.