I've no problem with guests posting, but what I do think needs to better is moving or deleting of posts - The Dead of 2013 thread, for example - a third are in the wrong thread, some of them are moaning about guests, some of them were HCW and TDF liasing and about 4 or 5 of the posts in The Dead of 2013 are actually about the dead of 2013. That said, It's not an easy task doing the admin and very thankless and I gave it up because I didn't want to be seen as anti-guest by deleting nonsense posts, amongst other time constraints.
Having said about deletion and moving, I do think if everything was in order and perfect, the atmosphere, already less than before (not gone, by any means, just not quite what it was), would be very sterile. So sometimes when iain/notaguest posts, it briefly does my head in, but the stupidity of what he posts does liven it up a little bit.