Well,it is basically a judgement call,and everybody may not necessarily agree with the call.Sometimes I agree and sometimes I don't,Moderators are human like evryone else and may not always make a good call.Also a thread may start out on topic and as it progresses it may go from some type of related knife content to a totally non-related topic,so it may change from a general forum thread to a community thread with a few posts.Moderating isn't an exact science and for the most part I feel they've done a fair job at moderating.Usually a locked thread just winds up being transferred to another more appropriate forum,so the discussion may continue.Welcome to the forums,you'll learn alot and have lots of fun if you stick around.Best Regards,Ralph