I don't think anyone is defending the police actions....certainly not me. All I am saying is that if you do stuff that is in breach of the law...and it is against the law, whether we like it or not...then you can't then complain when there's repercussions.
The police will have certain procedures they have to follow as a result of the incident...and what was seen last night was that being put into action.
Not nice, not welcome and not something people will want to see on a regular basis.
Best thing to do is take it on the chin, let the police procedures play out (which they have) and, especially if you're the person/s responsible for the smoke bombs, ask yourself if it was really worth it?
You had your bit of fun...time to move on.