Thanks for the help everyone. Understanding the fact that there is no 'grey areas' of this subject gives us the knowlegde to stay clear of trouble. BTW, to say "be careful with Qataris and don't make any dispute with them" is an odd comment. Whilst in a foreign country, a dispute with anyone could go horribly wrong. From what I hear, Qataris are fantastic people, and Doha is a very safe place to live.
Looking forward to it all!