If it's something that you feel strongly about, and something that defines you, and something that you invested a lot of time and energy into, I'd say put it down, with her name included. Some of the things that define a person the most are very polarizing topics (religion, politics). I would hope that adcoms wouldn't hold it against you just for having a differing political view from their own- I mean isn't that the point of selecting for a diverse class... to have different views/backgrounds, etc? Listing that you participated without the name, to me, shows weakness in something you supposedly care about a lot, and any interviewer who is genuinely interested in it will surely follow up with the question "well, who was it?". Sure some adcoms might grumble after reading a name, but I would hope at this level, most adcoms would know to put their own personal biases aside when selecting candidates. In the end, it may help you find the school that's right for you.