When "fan" videos use the entire theme song
 

As much as I love hearing those kick-@$$ lyrics Chuck Lorre wrote all those years ago, I can't help but find it a little annoying and even kinda insulting when somebody feels the need to put it in their video, especially the full 60 seconds. To me it just looks like the person is doing it for the sake of nostalgia instead of giving us something worth watching.