Well, what is an expert?
The guys who get themselves a "rich" businesswoman girlfriend and become obsessed that they have cracked Thai women just because they don't have to pay for having sex? They get driven around like some scrub / male whore from the Bed Supperclub to Q Bar and hang out with other similar types and Thai males who have nothing really that interesting to talk about other than their status and car?
The long term teachers who wear yellow shirts on mondays and still live in one room "studios" in Victory Monument after seven years and think that they know the full story on the monarchy and government because they have nothing better to do and no real friends cos they are as dull as dishwater? And, I'll add, too unattractive to find any girlfriend of any kind.
What about the continually complaining Americans who see a scam in every transaction they do with a local? Do they really expect to be charged 7 Baht for a motorsai taxi ride and haggle over the 3 Baht? These types will then tell every other farang in earshot how they hate being scammed by the Thais and are thinking of going to China. Yeah good luck to you there.
Or why not just live your life and go with the flow? Me personally, I've always had the meter turned on in taxis, been charged the local rate on bikes and at street food stalls, always found a decent f**k and never been stolen from by a dirtbag hoe.