Duckface is around because everyone does it, like the retarded Charlie's Angels pose trios of chicks do, or the 'sticking your tongue between V Fingers' pose if they are attempting to look lesbo-sexy.
Someone probably saw it in a rap video, or saw any picture of Jenna Jameson and lacking originality like most people do, if has been copied, and copied, and copied. Duckface will go away soon to be replaced by something equally banal.
I'm heading off to a capital of the duckface world, South Beach, I'll report back if the plague is abating.
There used to be a site of rock bands posing in front of brick walls, for a while I was collecting those, and escorts doing the same thing, but I see the new trend in Ho-pix poses is indoor Frost Fence [tm], so I might have to start a new site for those.