I've been thinking about this ever since the movie, and
It's clear that the government hasn't thought this through at all. Their media campaign is nonexistent - surely they could put a better spin on things than "we have the cure, because clearly you are diseased!".
With such a volatile issue, could they have not housed the vaccine/whatever in a safer environment where the already nervous patrons don't have to be shouted at? Or is this supposed to make people think of abortion in the United States?
Even after such a procedure, the government would need way more planning in place. For example, mutants have been broadly rejected by their homosapien counterparts, and so clearly there are going to be trust issues in integrating ex-mutants back into society. They feel untrusted by humans, and I imagine that a lot of the mutant population are going to feel resentful towards those who take advantage of "the cure" in order to blend in with those who previously wanted them dead. How are ex-mutants supposed to deal with the loss of identity associated with such an action? If all of the world's mutants are being traced, will there be an official register of ex-mutants? Will they need regular testing? ID Cards? Will previously broken families be able to be fused together again? Will people have to lie about their genes on job applications?
OH GOD I WORK FOR THE GOVERNMENT WHY CAN'T I STOP THINKING