A couple of mathematical odds to consider here....bit like gambling odds:
If every time you see a Rolex, you shout fake...the odds are probably something like 1000:1 in favour of you being right (just on numbers produced fake:gen)
Then proceed with the security of compounding the odds in your favour, and screaming fake all the louder if when asked where did you get it, the reply is anything other than an immediate and unreserved 'Oh from XYZ Authorized Dealership...cost me $xxxxxx'
A few more 'odds' for you...what percentage of the planet's populace have never held, never mind owned a wristwatch of any description?...of the balance, what percentage see a watch as anything other than a dis-interesting device to read the time off...now speculate of this diminishing number how many actually give a rat's ass about watches.... now out with the magnifying glass to see the number of people who are interested in watches........now the microscope for the ones who actually know a little of what they speak.........now the electron microscope to see the number of WIS who could speak with authority about your Yachty.
So after this rambling what have we learned? That if you want to play the odds....it was a safe bet for this nugget to call fake
and an infinitely safer bet for you to call 'loudmouthed idiot'.
Incidentally I always derive much amusement watching half witted tourists in the Far East when offered 'A numba won Lolek' by street hawkers proceed to evaluate it by mock weighing the POS in their hand (with that 'I know what I'm doing' look on their face!!!).