One of the most useful resources for spammers is the link shortening tool at tinyurl.com .  Because they provide a free service, it is great for mass spamming of comments onto blogs like this.  It also has no way of reporting abuse and that is because there is nothing in their terms of use saying you can’t use it for spamming purposes.

They actually have posts on their blog saying how to avoid spam filters.

tinyurl.com has gone from being a handy idea to become a spamming tool.

I am so fed up with spam that uses tinyurl links that I am going to configure this site to automatically flag any comments referring to it as spam and block the poster.

In contrast, bitly provides the same link shortening service but they actually respond to complaints of spam.  I know, I report them and they react.

Bye bye, tinyurl spam.  Consider yourself spam-flagged, blocked and deleted.