I checked the "Current Visitors" list and the majority of users were identified as Robots. If you can identify them, why can't you block them? Is there a better way to contact Admin now? I couldn't find one.
I'm no expert on the matter, but aren't many of those 'bots the likes of google and other search engines, here to index the place? I'm sure you're right that some must be bad robots, but I'm not sure a webmaster would be easily able to separate the wheat from the chaff.
You're correct, @Mr. X. A robot just means a computer scanning the boards, usually for search engine purposes. That's not a bad thing. Now if they start posting and asking for Sarah Connor, then we've got a problem.