Cullen was not muzzled. He got exactly what he wanted. A 30 second media clip and a bunch of people talking about how he got muzzled.
The hearing he attended was to allow individuals present “oral history”. Cullen was not presenting oral history and he, quite rightly, was politely told to shut up by the moderator. The Enbridge Hearings are following a prescribed process. Without a defined process, it will be a gong show. Mind you that is what the NDP want - they don’t want you to actually start thinking.
There will be a time later in the hearings for the arguments regarding scientific studies, etc. Right now the stage of the hearing was to allow people to provide oral history.
Whether one agrees with the pipeline or disagrees, one should allow the process to unfold. Turning it into a gong show does not assist anyone to come to a reasoned judgement. However, if the hearings turn into a gong show, it will be pretty easy for the government of the day, to ignore outcome of the process.
And no, I have not yet made up my mind about whether I think it is a good thing for Canada to do or not.