No.
1) He is booking or has booked for Thailand Dive n Sail, and did nowhere mention Siam Dive n Sail. And those 2 are different companies.
2) And we don't know whether he has booked already, I for example find it very normal to inform my guests before they receive an invoice of the payment conditions, including booking terms. So that he knows he has to pay in full on booking does not mean the booking process is complete except for the payment.
3) It sounds to me like cephasii is not affiliated with Siam Dive n Sail, but is just a customer there. But I could be wrong there, just as you could be wrong there. And most likely are since you don't even know the company.
4) And yes, agree, no-one should act like this, just as no-one on here should make offers by PM to people enquiring about options on the board. And I have every right to express my distaste for this sort of business practice.
---------- Post added February 8th, 2013 at 05:59 PM ----------
And don't edit your posts after an answer has been posted, that is very unethical.