On Saturday I participated in a protest march for the first time ever --- against the TPPA. I support lowering trade barriers, but the TPPA has a lot of baggage that I strongly dislike, such committing member nations to a dysfunctional United States-esque intellectual property regime, and sovereignty-eroding "investor-state dispute settlement". The biggest prize for New Zealand would have been free access to foreign dairy markets, but that was mostly not realized, so it seems like a bad deal for us.
Unsurprisingly there were a lot of different sorts of people involved. Many of them espoused themes I don't agree with --- knee-jerk anti-Americanism, "Socialist Aotearoa", general opposition to free-market economics. That made it more fun and interesting :-). I think it's very important that people who disagree about a lot of things can still work together on issues they do agree about.