My website is under constant onslaught by Bots who want to spam all sorts of things.  Moderating and deleting the comments is both a source of amusement and frustration for me.  Amusement when I see something new, frustration because some bot hordes will like to spam 100s of comments for the same thing over and over again.  Oh well, it is part of the "joy" of the Internet, right?