[rossdavidh]

If you are taking a disruptive approach to the government (at any level) of a place you are traveling, you should expect to have a high risk of getting arrested, and not necessarily being given a fair trial. If you are morally so opposed to the situation that you believe this to be a sacrifice worth making, ok then. But you shouldn't be surprised when it happens.

Also, it is not too hard to imagine a foreigner's "disruptive behavior" backfiring in terms of the impact on the locals' attitude towards the policy in question. Knowing whether or not your disruptive behavior will be a useful prod to change, or provoke a backlash against foreign meddling that actually reinforces the system in question, takes a lot of nuanced knowledge of the local society, which a foreigner will usually not have.