Alot of user generated content on the web has been made for entertainment purposes.
like this flash movie.It actually takes the mick out of the software thats why i like it.
heres the link
my younger brother pointed out that there is also a game based on this animation, we found it eventually, you have to use the tools to try and defeat the victim.
Its very hard though.
youll find the game here
I couldnt do it to be honest, i thought it was a good example of interactive media that was made for entertainment purposes though.