In the end, it really doesn't matter what the "party" stands for, it's what the "party" supporters will support and what they stand for. Because over time, the parties ideals will change to be in line with it's supporters. I look to the supporters and take cue from them. This applies to all large groups, not just the tea party. The Occupy movement is also not what is espoused by the groups involved, it becomes defined by the supporters. You have too many abortion activists at a tea party rally, or too many Che Guevara tee shirts at an occupy movement, and that becomes the party.
When I was in high school during the first gulf war, I was getting ready to go to a "No Blood For War" rally, my father told me to sit down so he could impart a bit of wisdom. He was around during the Vietnam protests and he realized that no matter how righteous the cause, the organizers are always self centered douchebags that are trying to steal the importance of the moment for their own spotlight. Now, some are better than others, and the cause may still justify going to the rally, but never be hoodwinked by the leaders of a cause. In retrospect, I have realized that is not always true, with leaders like MLK, but the vast majority of the time it is. And you have to realize, if its the leaders at a rally, or the supporters at a rally, once those individuals corrupt a cause, they become the face (or the voices) of the cause.