First off, I'd like to say, Fuck the Troops is not why I'm against OWS. I mainly don't think they're going far enough, but I'm also somewhere around anarchist politically. I had not heard about FTT in OWS until this thread, and what I can find on a quick google is saying it probably wasn't from this rally. I've also been led to believe that if it happened, most protestors would be vehemently outraged. What I see is them doing this exactly right, showing it's falsified and saying they don't agree in any case.

However, an organization is responsible for the actions of it's members, as members are what make an organization. If they disagree with some actions, they should do something about it. If it's small enough, they can stop it and make sure it stays a isolated incident. However, if it's a hot topic, as FTT would be/is, they will be forced to either agree or disagree with it being part of their image. If they agree, they can do whatever they want. If they disagree, they need to tell the masses. Ignoring it would be ignorant, as perception determines what you're saying, what you believe, what you allow. While it does not define the members within, it does define at least one aspect of the group. It's why most groups disavow anyone who kills in their name or while doing their work, but are forced to deal with the repercussion that come with it.

As with any movement, more so with political movements, people are often required to take what they believe is best between bad options, support the parts they agree with, and oppose and try to change, live with, or ignore the rest that the movement stands for. A problem with this lies in that, while the main purposes of these organizations are obvious, it is little things that help you figure out what the whole of an organization is, and many people don't wish to research. As such, to an extent, the individuals ARE defined by those they support. Unfortunately, you don't always know what you are supporting until it's too late. Godwin's law.