Like, I suppose, everyone who has a site like this, with blogs or forums or guestbooks, there is a lot of spam coming in. If you read my pages, you won’t see any because it is simply removed before it can be published, and the offending IP addresses are banned.
It’s a pain to have to do this, but no big deal.
If you are a human responsible for sending spam to my site, then save yourself the effort. No advertising and no spam here.