So the establishment believe that the courts will be used, with the human rights legislation; to ensure EU citizens can remain in the UK.
Some people are politically blind, deaf and dumb. Do they not realise that if hundreds of cases go to court over this, then the very first act of the government, post Brexit, will be to repeal the UK act which enshrines the European Convention on Human Rights into UK law. Which then will be immediately followed by a challenge to strip all EU citizens of the rights conferred by those legal decisions.
If they shut up and let the government and the EU get on with it, the government will, in the end, do the right thing. Unless the EU decides to explicitly expel all UK citizens. Which, of course, could be challenged in the EU courts under the ECHR.
Stupid is as stupid does. They still have not realised where we are going now. They will learn and there will be a lot of tears along the way.