Twice in the past month my hosting account has reached the maximum number of MySQL queries per hour, blocking access to MySQL. Twice it has not reset, bringing the site down for several hours.
On on average week, Akismet blocks a thousand SPAM comments.
Enter Bad Behavior.
Bad behavior has blocked 265 access attempts in the last seven days. Akismet has blocked 112 comments in the past fifteen days.
Coincidence … I think not.