We expect the government to shut down fringe cults that have children married off to the leaders.
Well, the JW's are dangerous to children, perhaps just as much in the long term.
But in the case you reference, the persons who had endangered the children were arrested for their specific actions, not necessarily for their beliefs. Moreover, anyone, whether extremist Mormon or not, who married a child for whatever reason, would suffer the same consequences. It sounds like these arrests in Russia were made purely for having the WT and AW on the premises. I think there's an important difference. Legal repercussions should be on the basis of activity, not beliefs, whether in print or spoken. This is an integral part both of free speech and freedom of worship, something with which Russia has a long and troubled history. If Russian authorities have concerns over whether JW's break up families or whether children are dying b/c of the blood issue, then these specifics should be addressed through the appropriate legal structure, not through totalitarian harassment of private citizens.
As another poster noted, who's next? Actions like these in Russia are all too often the harbinger of harsher oppression against all kinds of groups who happen to be out of the mainstream. Violations of human rights are violations of all our rights, no matter where it happens and no matter whether we happen to share a belief system or not.