Thanks for the reply Steve, it's appreciated, although it would be good to hear from whoever did make the edits.
I can't say I'm particularly comfortable, though, with the thought process behind it. Abuse, discrimination, yeah fine, delete it. But just because it might take a thread off topic, in the eyes of the moderator? That seems way over the top, and contradictory to the whole free flowing nature of forums, and the ability of people to respond to each other in a free and open way. If people feel their comments are going to be edited, it won't be long before they stop posting.
I know that I occasionally deliberate massively on the exact composition of what I write, so as to get the impact and context right, in order to make my point (or correct someone else's) concisely and accurately. If it's then going to get edited I might wonder why I bothered? Or will this post get edited as it's seen as derailing the thread???!!!