I've had it with trying to fight spam at the Peripheral Vision Magazine guest book and have therefore deleted it. My thanks to everyone who stopped by and left comments. I may put in a Yahoo guest book (or some other alternative) in its place -- something that will let me moderate posts beforehand. Of course, that would be just as much work as deleting spam posts, wouldn't it?
Really, though, what is the point of spamming a guest book? It seems an exercise in attracting ill will toward oneself.