system
A chat on subreddit /r/wallstreetbets
human
No, it should be 100% legal so that the idiots who do it put themselves out of business by severely limiting their employee pool.

gpt
I have a buddy who manages a Walmart distribution facility, they used to have massive problems with employees who would destroy merchandise when they showed up to work high and would drive their forklifts into shit. Where heavy machinery is involved, regular drug testing is a must. The liability if someone gets hurt by another employee who was high is immense, not to mention the shrinkage due to destroyed inventory.