These illegal taxis are encouraged because of the bad attitude of karva taxis.They dont want to drive by meters and they asked you if you go that area i will drop you otherwise i am busy.
Yesterday it happened with me with 3 karva taxis at 1100 hrs.At the end i opened my internet on my smartphone,opened qatarliving and called limousine/private taxi.Came immediately.All these because of their bad attitude.Otherwise no body likes to pay more and also do something illegal.