I have been seeing a lot of questionable referrers in my WordPress statistic. They obviously are coming from spammers and scammers. For the past week or so there are a lot of referrers using URL shortening services such as tinyurl.com, bit.ly, etc. I cautiously opened the links to confirm my suspicions and almost all of them are pointing to domains I have already blocked.
While the URL shortening services are very valuable, they are also easily abused by the unscrupulous.