Say whatever you want, no one really cares. Personally, Ive never been asked whether or not my watches are fake... quite frankly, its rare for someone to even know about luxury watch brands outside Rolex anyway. Next time you are at a party, tell everyone you can buy Panerai at Wal-Mart. Chances are, they will believe you.
Ive only called out a fake watch once.... and I was pretty drunk at the time. I dont think I would do it sober.