You could always get four of your politicaly similar friends to start playing and create your own guild.
Several names for Right or Left leaning guilds come to mind:
<Commie Libtards>
<Teapublican Koolaid Drinkers>
<Wingnuts Anonymous>
<All Thats Left>
<Rich People Suck>
<Poor People Suck>
<Reagans Avengers>
i could go on all day...
Of course, I think most of us play the game to get away from all that crap.
If there are players who can't keep that stuff out of chat, /ignore is a wonderful thing!