Looks like democracy has well and truly failed in Canada. Just wow. Look at that oversight. I think it is just a matter of time until this bill is used to target people for acts other than terrorism. With this kind of power comes misuse. If you're Canadian, be careful what you say online because it might be used to stop you flying or worse, imprisoned.
The problem is as usual the culture. If most of the people truly don't want this then it's just a matter of time until they do mass protests/revolt, etc.
However, if the government manages to control everything quickly - Putin-style - and then through the brain-washing mass-media manages to change the culture and make people believe that what they are doing is good and right, then yeah, you're screwed. Look at China - most people there seem to actually believe that "censorship works" in "keeping the society united" or whatever bullshit the government is feeding them.
That's the real danger. Not some random dictator coming to power. But a change of culture and beliefs in the population.