Political activists (unless they're undercover cops or foolishly misunderstanding the situation) do not target random property for "destruction." More importantly, they actively avoid detroying property of local business shops...this is from those who believe in property destruction as a protest "tactic."
To learn MUCH more on the reasoning behind this and where the people who do these *HORRIBLE* things actually stand, read http://www.magicnet.net/~jza/misinfo/allantiauth.html
It's really disturbing you're wishing violence and hurt on people because you are afraid they may destroy some property. Is private property worth more than human life to you?