(Submitted by Veeshir [High Praise!] via Urban Dictionary [sidebars may be NSFW])

Barrycade
1. A barrier (usually temporary) that exists for no reason. 2. A barrier erected for political reasons.

“Dude, Obama barrycaded the park.”

“Hey, let’s put up some barrycades to keep those World War II veterans away from the open-air World War II Memorial in Washington, D.C., in order to try and score some cheap political points.”

Veeshir adds: “I prefer the spelling ‘barackades'”