Most companies that employ people have to follow federal workplace and safety rules and regulations, and that translates into carrying different types of insurance. And most insurance companies will force the companies they insure to perform some form of drug testing or they will drop them in most cases, or charge them more and this is usually a very significant amount. And being marijuana is still illegal under federal law and companies have to follow federal rules it makes it almost impossible for a company to bypass or drop drug testing from it's policies, whether the upper management or owner wishes it to or not.
I read this article yesterday and was surprised this was about a legal MEDICAL patient, not a rec user. So the precedent already set, and now reset at least in CO, will make it a even tougher if not impossible hurdle to get past without actually having marijuana legalized at the federal level. Something I doubt will ever happen at least in this decade.
I SMELL a HIGH unemployment rate in Colorado's future. Sad but true. I don't need to take drug tests as I work for myself but people I know use the synthetic piss kit with the heating pad and built-in thermometer with great success. But eventually testing will become much more frequent and much more sophisticated. It's a market of all it own. They are even starting mandatory drug testing in high schools for athletes and will soon be including all students I'm sure.
My advice to smokers is fight the good fight but be prepared to lose that good fight in the short-run at least and have a good test beating system on hand at all times.