They're a combination of actual people and search engine 'spiders'. Prior to registering, you all would have been one of those people recognised as a guest. Additionally, search engines send their spiders here to index the community, which is how most (if not all) will likely have found us in search engine results!
Ah, now I get it, I'd never heard of spiders before :icon_redf. Thanks for replying, I really appreciate it (*hug*). Curiosity always gets the better of me; if I were a cat I would be a zombie by now :icon_wink. P.S. Cool signature.