Originally Posted by
graraps
No, they won't (with the exception of the special disease-prevention circumstances you mention).
Even if they did, when was the last time you ever saw somebody being stopped in the blue channel? Mine probably was in 2004...
As I say - not an expert - just relaying the Spanish advice. As for blue channel stops - me, last week, return to UK from AMS - must have fitted some profile or other for the day. Either that or they were really, really, bored.