How to delete the recent spate of spam

Has your guestbook suffered from the recent increase in spam? The ones where some of the names are dates, the homepage is umax or hotel-shop, and some of the names have +'s instead of spaces? Well if you have access to phpMyAdmin or the ability to run SQL queries from cPanel you could try this

This should work as all of these spam entries appear to come from one source which I believe is a worm or virus of some sort. All of the entries from this one source have the exact same ICQ number and this query should delete all posts that have that ICQ number.