"BookCrossing has been attacked by bots in what seems to be causing somewhat of a DoS (Denial of Service attack). These bots are automated robots (in other words, computer programs, not people) that sign up for accounts and then spam membership on sites. Normally we get about 200-300 new members a day, some are spam, most are not. In the last 6 weeks it has grown to 600, then 1000, and lately 5000-6000 a day. I ran that report last night and then installed in a new Google captcha on the join page to stop the flow of new bogus members. That has worked, we have 178 members so far today. But the bots are still coming and hitting the signup page, so far about 40,000 times today. I've installed monitoring software to try to catch them by IP so we can block them. That's a long answer for: we are working on it, and trying to get the site back under control."