Well I suppose this will be interesting. Just invoking the Emergencies Act is unlikely to actually change anything on the ground, so the question becomes "What is the government going to do to actually change things?"
Freezing bank accounts in Canada is easy, because you aren't going to find a bank willing to defy those orders. The downside of that is the knock on effects. Frozen accounts mean the associated business ceases to do business; no bills are paid (either too or from), no goods are delivered, etc. Depending upon how ownership is structured, who exactly is involved in the protests, and what criteria the government uses to freeze accounts this could be a nothing burger or far bigger.
I mean you could easily have banks or other financial institutions having an ownership interest in the rigs and/or companies in question. And if their accounts get frozen? Well that can have massive knock on effects. On the other hand, not freezing their accounts but freezing the accounts of other entities in nominally identical positions raises its own thorny issues.
Arresting people on the ground? Finding enough "legal" justification for that was never the issue, being willing to pay the political costs to do it was. This doesn't change that. I mean Blackface could call up a few thousand troops, surround the entire protest, and then have them move in and arrest/detain everyone present. He's been able to do that basically since day one if he was willing to give the order and deal with the fallout.
Absent that though? Just telling people to go home isn't going to work.
And try to arrest everyone and you run into two potential issues.
1) The protestors decide to get violent and are willing to forcefully resist the police. Politically, this is better for Idiot than most other options because it lets him tar the protests more effectively as violent extremists and justifies his actions. On the other hand, dead bodies (either police or protestor) really don't play that well politically and any competent opposition party (not that Canada appears to have one of those) will blame the violence on Trudeau's actions, statements, and policies.
or 2) The protestors basically let themselves get arrested and don't get violent while their PR people are using that as evidence for how the Tyrant is mass arresting popular demonstrators and that Free Speech is dead in Canada. Raising money for lawyers wouldn't be that hard, and the protestors get to basically turn the entire affair into a drawn out PR battle and court fight.
