I'm with Dennis and Maria as well. If I can't see the actual URL when I hover over it, and it doesn't match what it says on the page, then I get nervous - unfortunately, that's how spammers get you to click on things that have the potential to load malware or viruses, and as much as places like tinyurl do their best to control it, I can't imagine that they're foolproof.
So unfortunately, when I encounter one of those links, and I feel like I have to click on it, I kind of feel like the bomb disposal unit being told to click the blue wire... and hoping it's the right one.