Originally Posted by
Aviatrix
(There is a difference between identity checks and immigration controls. While identity checks at borders are carried out by immigration officers in many countries, they cannot deny entry to anybody who is covered by EU Free Movement Rights - which includes immediate families)
Here is a direct example of where there are clauses (for lack of a more specific term) that give member nations an out. There is a clause that allows member nations to temporarily block entry of EU nationals. It's a big deal now with the Tunisians, but it was also used by Germany to keep English hooligans out of their country during the World Cup.
The point is that these laws are complex and have exceptions. Only a local expert will know it all.