Mass-surveillance makes impossible to have any honest cold-minded debate on the subject unless one is an important person, but here is some relevant material. https://www-cdn.law.stanford.edu/wp-content/uploads/2019/02/...

It was not phrased as an advocation, merely as an argument that it is in fact possible to effect change on an individual or small-scale level.

As for calling it "terrorism", you would not call what is happening in Hong Kong right now terrorism would you? However, it is the same kind of "sabotage" of the smooth operation of society that would be necessary to bring about change, as it puts pressure on those in power to act. Grounding planes and shutting down major roads can be terrifying and are the same effects real "terrorism" has too.