By all means feel free just to chat in the guestbook - as long as it's not spam!
Anybody with Admin below their name is definitely me or a trusted person. I myself will always sign as Butterfree. If somebody signs under that name but does not have the Admin label, it is most likely an impostor.
Commenting on: 03-29-12
Just gotta say that I'm entirely with you on advertising. I've always despised it, and on the web it seems all the more obnoxious–trying to browse without AdBlock (or even on Chinese sites, where the filter list I have doesn't work well) is just so much more unbearably ugly than if the ads are masked.
I really appreciate your choice not to have ads on your site and wish it were more the norm. It's surprising to me that you get so many people bothering you about it!