I am actually surprised they arrested her, with care. It must have been what was on the slogans and I'm guessing the slogans were saying that Putin is a proper ....... Could be wrong.
You will get police that side with the demo people as well and atm more and more people are learnign why the west is removing, stopping selling their goods as it is often those that have access to western media/travel and affordability will miss it most and they carry the most weight and more and more people are blaming putin for attacking fellow Russians in Ukraine and getting their own killed in the nasty process.
Several MP's have openly spoken out against Putin a couple of days ago