No, but the customs officers do. It's been commonplace since forever. Wearing watches was one of the most common methods of smuggling, as you normally have to pay huge tax on a fancy watch.
If you wear a blinglex through international customs, you may well be asked for proof of purchase. If they start to examine it closely, the more astute of them may well spot it as a rep, but even more frightning is that if you go through customs with a fancy replica wristcock, you may well have to pay import duty as if it were genuine.
It's worst when you go home from a foreign country, as they can do you for smuggling counterfeit goods and several other charges.
If you're usually stopped going through customs, don't wear replicas.
If you're on internal US flights, you should be safe.