I am a western woman who used Karwa buses most working days for 2 years, not for a short trip, Dukhan-Doha return daily. (round trip 3 hours). Almost ALL of the other passengers were men who were working on the roads. They treated me with nothing but respect, courtesy and yes, sometimes they may have been hot from working 8 hours in the hot sun. They are worth 10 of the people who think they should be banned from buses, decent hardworking men away from their families to give them a better life. Most people who turn up their noses at these people wouldn't dream of taking the bus anyway so no issue as far as I am concerned. If you still feel this way after using Karwa on a regular basis then fine, that's your opinion. If you don't ever use the bus then I don't see why you feel so strongly.