I don't know. The way I see it is that when you stand on principle, you're already at the top of the ladder. Stuff like this knocks you down a few rungs.
The credibily of this movement will grow regardless, if we choose not to endorse status quo candidates. I say we might as well save on soap and keep our hands clean. The long-term payoff will be much greater.
Then you also have to consider who we are trying to get the support of. If someone wants me to change what I truly believe in order to get their support, I say, F' their support, I don't need nor want it. Nor would they probably want me to represent them if they began to suspect that I did not truly believe what I was telling them (just to win their support), so no one wins in that case.
As to the broader picture, of politics and perception in general,
I can talk about the virtues of democrats and most people won't listen, because they'll think I'm full of crap. I could talk about the virtues of republicans and most people won't listen, because they'll think i'm full of crap. —Because out there, outside of the two-party establishment, out there, exists a world where people hate both sides, but aren't very vocal about it. It is THOSE people I want to gain the support of (they are, by far, potentially, the largest political force that isn't . . . yet), because I too am fed up with the system and wouldn't have to change one thing I believe about the system in order to find agreement with them. To pick a side now would blow every shred of credibility with them, that I have mustered thus far.
I don't think that people take the time to consider their own personal credibity in who is watching them, whenever they so nonchalantly go along with supporting candidate so-and-so.
Who is watching you, R3volution?
Take time to think about how your actions will reflect what you have gained in the eyes of the apathetic, the disheartened, and the frustrated. Will you be another rock that will not budge when the river flows over you? Or will you go along to get along, proving yourselves in the eyes of the spectators to simply be another chapter in the story of those who fought against it all, only to become it all—same as the rest?