Ugh, just what the working force needs... Not surprised though. I used to live in Boulder, CO, the hippy-stronghold of the oh-so-open-minded Colorado (ha, yeah right). Sure, people like to smoke pot there, but many, possibly a majority (most CU students excluded of course ;) and a chunk of Denverites) still have VERY conservative views on essentially everything else. Kind of the 'drugs are bad! Except MJ, because God made that glorious plant!' mentality (also is part of the "Bible Belt", which adds to that abrasiveness towards substances).
Anyway, in my time there and working different jobs, literally every single place I applied or worked drug-tested. For everything. Employers there took it very seriously too, often without notice and of course, with supervision. Needless to say, that shit sucks. In contrast with California, where having worked and applied to an even larger number of companies, I've never once even seen a drug test. Funny how that works. While the test would be a huge breech of privacy (nothing new in the states), I'm sure if anyone were to take the issue to court, a court would rule in favor of the business having a right to know what chemicals are in a prospective employee's system, or some BS like that.
(Side note, it was legal there since early 2013/late-2012, I think just over 30 days after it passed, arrests were no longer made and you could use it openly, just not buy it legally unless prescribed) Oh my god shout out to Cheeba Chews as well, those things are so tasty and obliterate you. Damn, I miss em, lol.