Yes, it is bad sign. I completely agree here with Tsar. When things like this start to happen more and more it could be clear sign of bad things coming.
I saw things like this prior the collapse in my region, and yes it will be not about amount of the force, it will be about amount of the people who will lost the trust in the government.
Events like this will speed up things and wake up people, government will be weaker and weaker, but in the same time more willing to take tough measures.