At work today and noticed a guy wearing carbon X Squared. Clearly a fake set. Had Oakley stamped on the nose bridge and an O printed on one of the lenses. Stems were all wrong ...do I dare tell him.
Id tell him if I was you. I told a guy once his Juliet's were fakes that he was trying to sell me. he was in denial until I showed him the differences. he then blocked me and reported my ad to facebook but if your workmate buy them from a store or payed via paypal or credit card he may have some recourse to get his cashback.
Show him what a real pair looks like. My BIL bought a pair of Jawbreakers when they came out claiming to "test them before buying the real thing" Got him a real pair for Christmas.