I am not so hard against that guy. You seem to take it for granted that if someone is wearing a rep, then he is trying to fool the others. Maybe he simply liked that watch and he could not afford the gen (a likely assumption, considering $1.2 million). Rather, he showed quite a good taste in choosing that watch (which most people are even unaware of its very existence).
My point is: in a word where everyone can get a good copy at a reasonable price, we are going to meet people with oustanding watches often and often. So it will not make for an attempt to impress people anymore: seeing and showing Daytonas, PP, etc, will become (has become?) common. In such a word, 99% of pricey watches are reps, and anyone seeing such a watch thinks it is a rep, so noone can try to impress people with his watch anymore. In such a word, when someone wonders whether a watch is a gen or a rep it means that HE is interested about the guy's financial income, not that the other is wearing it in order to show "Hey, I have $$$!"
SF? We'll see... As for now, I give anyone the benefit of doubt, especially when he is wearing a watch clearly too expensive.