The avatar used on the PolygamousWU account violated the guidelines. It is expressly forbidden to try to spread propaganda by hate groups in any fashion when posting, and that extends to avatar images.
We also found that the IP used is tied to two other accounts, one previously banned for bad behavior while throwing a tantrum over our editing policies. Some folks just can't seem to stop themselves from trollery.
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.