It depends on what you understand by citizenship. As non-Brits they don't have a long-term interest in the future of Britain. For instance, we can assume they w

It depends on what you understand by citizenship. As non-Brits they don't have a long-term interest in the future of Britain. For instance, we can assume they will likely have family connections elsewhere. They can leave when they like. They are in the UK for what they can get out of it, as of now. That is not meant pejoratively. It is what I or anyone else would do. If we have the freedom to do so, we plot a life trajectory (including where to locate) with respect to our best interests. I wonder where do you get the 10% figure; how on earth would you know that in the three days since polling? It's difficult to know what to make of folk who given three months of intense EU/Out/In discussion across the land suddenly discover that they didn't think their vote mattered or that they couldn't make up their minds and tossed a coin. They need a lesson in how democracy works. It was expected that the pound would fall and markets react negatively in view of the immediate uncertainty. Aside from that, what's happened that would make someone say "I didn't know it would be like this"? Even Paul Krugman, a would-be remainer says " I’m finding myself less horrified by Brexit than one might have expected – in fact, less than I myself expected. The economic consequences will be bad, but not, I’d argue, as bad as many are claiming. The political consequences might be much more dire; but many of the bad things I fear would probably have happened even if Remain had won."