And how often, exactly, does this happen? It sounds to be an extremely rare instance. I am sure a person could provide a prescription to prove they used pot for medical purposes. As far as being in a country where a drug is legal, a person could explain that to the employer, I suppose. It would be easy to prove that the employee had, indeed, been in the certain country during that time.
Your concern with drugs’ mind-altering ability seems to come from the possibility that someone would show up at work high. I will not mention alcohol in the context of an adult because alcohol is legal for them; however, do you believe an employer has the right to test employees under 21 for past alcohol use?
They can kick kids out of school for using alcohol. No one is stopping that from happening. If an employer wants to test a potential underage employee for alcohol before hiring, they can give it a shot.
Also, are you concerned that someone will show up at work high because you believe a majority of drug users will do that, or do you believe even the tiniest possibility is a reason to test?
For one thing, I’d like a cite for what percentage of drug users abuse or do not use drugs properly. I do not believe the percentage is “tiny”. Could you provide some sites on this issue? I believe spooje asked you before for a cite, as well. I believe a reasonable concern exists in the minds of many employers about drug use. At my previous workplace, several employees smoked pot while on the job. (Some of them used equipment that could be dangerous.) At my current workplace, drugs have been found at the workplace. (They never did nail who was responsible for it.) What are the odds? I don’t believe that drug use at work is a rare, remote thing. I’d like some cites proving otherwise.
Would your position on drug testing change if some or all or those drugs became legal?
If they became legal, then that would change the issue somewhat. I still would think some employers would have to right to place restrictions on who they hire. Especially where a concern for safety is present.