I've said before, I can't understand why anyone takes the SWP seriously - or gets involved in the bottom end of the dialogue of the deaf between 'stoppers' and 'revisionists.'
But, while looking through the higher end of that discussion - a bunfight between Norman Geras and Ken MacLeod - Ken said:
"During the Cold War, the Communist Party had, as was often remarked, an influence out of all proportion to its size. The same could be said today of the Socialist Workers Party, but in reverse. Its influence is smaller than its membership."
It's certainly true that, if you are involved in a campaign, and the SWP decide to support it, your campaign is truly fucked from that point on.