I have trouble believing that it's a phrase used by adults, too. In the late 1970s/early 1980s, when I was a kid, yes, kids said something was "gay" ("retarded" or "lame", too) when we didn't like it, and called other kids "homo" as an insult. But not in front of adults.

Clearly, Canon corp. is supporting the homosexual agenda by trying to prevent normal, straight folks by causing a pop up when printer owners use something other than genuine brand cartridges.