Yes, YOU, the person who is looking for guestbooks to sign!
Do you honestly think that I'm going to permit someone who is specifically searching for guestbooks to leave an entry in mine? I mean, really and truly? I know what you're up to and I don't approve. Not in the slightest. Does your mother know you are doing this? She wouldn't approve either.
Stop looking for guestbooks! It makes you no better than a telemarketer. Say, you aren't a telemarketer, are you? You see, I don't know much about you, but from what I do know, you seem to fit right into that sort of personality.
Using someone's guestbook to advertise is a pretty lowdown and rotten thing to do. After all, they put it up in good faith and now here you are trying to abuse it for your own gain. That's not very good judgement, if you ask me. It also in very poor taste.
Just think of all the things you could be doing instead right now. Smelling a flower. Reading a book. Writing a book. Calling your mom; when was the last time you talked to her?. Yes, all of these are good activities.