This is timely advice from you, Luit, to be aware that not everyone is a gentleman as well as a business man, when there are some who do not play fair.
When there are truly professional traders who work hard to do the very best for their customers it must be very hard for them to find their standards broken by others, especially when a traditional trade of a country/people, such as the Dutch, is harmed by the actions of others.
Ian is reading an art book at the moment about "The Art of the Forger".......with this and your nickname as our own "Dutch Master", this topic is very apt, thank you!