@drak That's a far bigger problem than just relevant to one poitical group and it's not just on one side of the political spectrum (feminist wikipedia editing parties exist).
And once you have wikiepdia editing parties there's only two ways (I can think of) to get rid of the misinformation they spread
1. by finding some way to ban wikipedia editing parties ( this also includes banning editing paries you agree with )
2. by editing wikipedia