I don't go in chat rooms because, I admit it, I can't keep up - they tend to go too fast for me - so I'll reserve judgement on what's gone on in this one.
I'm a member of 3 other discussion forums similar to this one and I've seen people resign/chuck in the towel/announce their departure/flounce out numerous times for various reasons. Why bother? If you get annoyed/fed up/disgusted etc. why not just stop posting? Is it to give others the chance to say, "Oh please don't go", or is it just in case nobody notices you've gone?
I doubt AccyWeb will go into a decline if a few members stop posting. It's a good site with a lot of good personalities and some interesting viewpoints and the odd spectacular argument just makes it more interesting.