In addition to polluting the internet, it seems sploggers are starting to create more problems. Randy Charles Morin of KBCafe had set up a free RSS subscription service, that would let blog owners make it easier for visitors to subscribe. A splogger started using this service and put the Javascript for the service on thousands of blogs, causing bandwidth problems for the service. Unfortunately Randy has has to shut down the service because of this issue.
Thanks to Mark Woodman for pointing this out.