Normally, Leonard Cohen is regarded more as a poet and musician. But the darker side of Leonard Cohen alleges an addiction to Goatse.
YTMND user Suzanne has made lots of sites mentioning Leonard Cohen which often involve using the Goatse image in them. Many of them are NSFW. Basically, the YTMND user who made these sites has a name that is also the name of one of Leonard Cohen's classic songs.
But these sites have been deleted as a response to gr33nscr33n email family members of a Suzanne activist. This proves that the bait-and-switch trick of showing Goatse every time Leonard Cohen's name is mentioned is controversial for similar reasons why Goatse itself is controversial.