I hate when people use it and think it's hilarious.
It's actually not funny anymore, in fact it's pretty stupid now.
It was funny back a year ago maybe, but now everyone outside the internet is using it and pretty terribly. Go ahead and look up "rick roll" (You will find Rick Roll videos. I am not responsible for your Rick Rolling by watching a Rick Roll video on Youtube. By reading this post at all in anyway, you acknowledge this bolded text because you can see it because its bold.) on YouTube, and you'll find lots of videos of people either singing it to their class, presenting it to people or some stupid newscast.
It's just run aground now.