Crooked Taxi Driver

I cannot help but think all Texi drivers are somewhat crooked, perhaps we should exclude those in Japan or Britan. I have got a lot more unpleasant experience taking taxi after moving back to Asia, maybe, by large number theory, I am bound to meet with the nasty lots.
I think all texi drivers are trying very hard to make extra buck or two, which makes them, ur..., very aggressive. I read that the KL texi should run by meter, so I filtered those without meters. Finally I got on one texi with meter, but was told the meter is broken while departing the cab. I had to pay whatever comes up in the driver's random guess. Some drivers would purposely take you on a grand detour, the upside of it is that you can have a tour... but with someone you don't really know and fear what he might do to squeez out more money out of your pocket.
I am especially nasty to those taxi drivers without licenses and try to recruit customers from the street. Maybe they are just earning a living, but for some strange reason, they all look like criminals. In Beijing, at every train station, those dress in filthy clothes and flip-flops, not very well shaved, haircut at least 3 month overdue, would approach you saying "want a ride?". That scares the hell out of me without fail. I usually just walk away pretending not hearing anything at all.
This morning, while I am trying to leave for the airport, I had to take a taxi to the airport express train station. I would have taken the public transportation if they operate before 6. Anyhow, I walked out of the hotel where a line of taxis were waiting.. wait a minute, not in the destinated taxi waiting area but the road side. I wasn't very sure so I ask the porter, who indicated those taxis are ok (guess he has to live peacefully with thosenon-licensed drivers). Anyhow, I got on one cab, which charge me 3 times out of the normal rate since there is no meter. I just got off the cab and shout to the porter "they don't run by meter".
While waiting for my official cab, the negotiation continued. I insisted my official rate and amazingly, they wouldn't give up. My official cab finally came. To the KL Sentral, fine. During the ride, I was so worried again for no obvious reason. Does he understand me? Does he show me around the city again? Thankfully we arrived in the central station fairly quickly and the \fair was surprisingly low. I was so happy that I have made the right choice and then he turned to me saying this is the night rate, I have to pay double of the meter price because it is before 6am. Of course, no receipt.