The point I was poorly making was that the powers that be will likely weigh the costs and benefits of shutting various things off, and the perceived cost (negative impact to innocent parties) for disabling twitter is probably so low it barely registers.
I agree with you completely. However, in a Democratic government the decision to limit the freedom of your citizens shouldn't be made based on how easy it is for you to do but whether or not it is the right thing to do.
