Deporting people born in Britain?
Where to, exactly? Wait for Wales to fully separate and then send the family back to Cardiff?
But the whole automatically-punish-the-clan-for-the-sins-of-one has a bracingly Old Testament flavour to it, the sort of inhumane crap that ISIS espouses. If the nation ever decides to thoroughly abandon any stake on moral high ground then it would be a good way to go.