There are risks everywhere. UAE is not going to risk having us as an enemy.
In every port they have operations, the local natives are in charge.
If you haven't read this, you should:
Article in upper left hand corner:
Ports & Politics - the UAE/P&O Deal
http://www.globalpiracy.com/
the UAE risks nothing. Egypt Air had a pilot of theirs ditching a plane load of US passengers into the atlantic ocean a few years back, did the US bomb Egypt over that? of course not.
if something were to happen, DPW would simply say "oops, they slipped through our security".