As much as it sucks that Twitter is forced to do this, the government of neither Russia or Pakistan has a legal system which I would trust to fully respect the rule of law in this matter--either is likely to simply block the service if the requests are not acknowledged.
As principled as Google's stand was in refusing to pull an offensive video, it probably did more to stifle the free flow of information than had they pulled the "offensive" video on request. At least that way people would have an idea of which specific videos the government didn't want them to see, rather than the entire site being blocked out.