Man after seeing so many threads with red in them, might I offer a more civil approach to policing the threads? How about you just leave it up to the posters to report offensive posts? So many threads contain just back and forth ribbing or blatant sarcasm, yet they have been treated as more than that. It is the internet and people enjoy arguing. Most people are not going to hit the report post button unless they are truly offended. I can't imagine you like to go through all the topic threads.
Also reconsider the 30 day point expiration to 7 or 14 days. Most members check this forum multiple times a day offering their opinions.