Cached bad IP

There was a reason. The activity list only shows the last 25 events so the real reason is lost. It could have been that the user was too fast, used a bogus header or did not have an http_referer. The plugin does lots of checks before it checks the SFS db.

The best thing to do is clear the cache on the stop spammers history page and watch to see if this user fails again and find the reason before the log record is lost.

Keith