Since "tag" is another word for graffito...

... this. And Montreal is a big graffiti town.

Makes me wonder if the graffito reading C’eci n’est pas une pipe is still there, painted way high up on a brick wall, and visible looking down from the second floor of the Montreal Museum of Art, on the Sherbrooke Street plateau.

But I'm really posting this for the benefit of the theorist who can dilate on "tagging" versus "tagging" -- if indeed there is a "versus."