I don't see how you'd go about picturing this, so I say keep it.
Yeah, unwritten rule number one: follow all the unwritten procedures. - Camacan
Hi
I don't see how we could ever pic this in any way except a lampshade or a Visual Pun, and because of that, I vote to keep.
Existence Weighed Against Nonbeing
I also vote keep. This is an abstract concept that's basically impossible to picture. The Visual Pun isn't going to confuse anyone, so there's no reason to pull it.
Reaction Image Repository
Zzzzzzzzzz
^ and ^^ Agreed.
If you've got a better idea, Twentington, tell us. Otherwise, this feels a lot like a "pulling a picture because you don't like it" IP.
edited 13th Nov '11 10:22:30 AM by Madrugada
...if you don’t love you’re dead, and if you do, they’ll kill you for it.
Voting to keep. 
The concept of "canon" is probably unpicturable, so I'm fine with just leaving the Visual Pun. Voting to keep.
Keep Until Better Image Suggested.
Welcome, traveller, welcome to Omsk
![[up]](https://static.tvtropes.org/pmwiki/pub/smiles/arrow_up.png "[up]"){kind=icon}
This. Either keep the image or make imageless.
Hi
That's enough consensus. Locking up.
Besides being homophones, cannons generally have nothing to do with canon.