FCO is the only airport I've been to* that requires you to pass through the security arches on arrival.
Uh? Really? OMG!
I thought they had put it only on connecting passengers arriving from outside Schengen (which is normal as it is the same story on all European airports).
I will try it the next time I get there from London with a can of Coke.....
Ciao
Ulxima