But does it have a EULA too?

I haven't clicked through any "agreements" yet.... but I'm sure if I install any of the computer software, there will be EULAs aplenty.

I was thinking a EULA for the camera *itself* ("This camera is licensed, not sold. By using this camera, you agree to the following: ..."). Maybe EULA'ing the embedded software is practically the same thing
(sure, you can take pictures, but not download them anywhere).

Next they'll be telling you what pictures to take.

I think Starbucks uses this angle to enforce their ban on photography in their shops.

Anybody can claim anything. Aside from restrictions imposed as a condition of admittance to a venue or performance, it would seem that simply recording by film/digital image, whatever, taken in public, where there is no expectation of privacy, then the rights to such images would reside with the photographer.

I suppose CANON could explain what they mean by their notice and under what circumstances they think it might apply. I doubt any type of "shrink wrap" or other unilateral assertion could overturn or transfer the photographer's rights. At least in most jurisdictions in the USA.