I've recently noticed mods on PF are allowed privileges not available on most forums. They can edit not only their own posts but also other peoples' posts in order to conceal any error in their original post and even, it seems, boast about it with impunity. That post is gone but the memory lingers on..... Mods can remove posts with no apparent indication they've ever existed. I doubt it works every time, but one way to prevent any visible challenge to a plausible post which breaks forum rules is to deliberately break forum rules in a later post and challenge the mods to do something about it. In this instance the post was left but all criticism was deleted. There was a suggestion by (I think) a mod that my own post broke forum rules. As I didn't receive any sanction I have to assume it didn't. Predictably, no one posted any further criticism and it's now (I think) against forum rules to refer to it directly. The most irritating thing is that the claim in that post is largely accurate, but the only evidence given is an almost certainly false statement by a lazy reporter. That statement has been debunked on other forums, making PF members look credulous. In future I'll be reluctant to put much effort into a post in case it gets silently deleted; a form of self censorship. All I have left of those posts is a few innocuous emails - no smoking gun. I now have a small amount of sympathy for FBI Director James Comey.... I suggest that mods be required to indicate clearly any editing of users' posts. If posts in a thread are deleted, mods should at least leave a post indicating how many posts have been deleted and normally why they've been deleted. Most forums allow fine control of permissions; if possible mods should not be allowed to 'vaporize' posts.