I think the follow up from the OP said employees in the office are subject to random drug tests and having employees going to the homes for the tests is a way to keep things "equal".
OP here...
My opinion for what's its worth... is first its a privately owned company, so they make the rules... you are told up front that it is a drug free work space, so you know going in that drugs are not allowed.... so whatever your stance on them is not up for debate with the company... It's a drug free work space, and if you enjoy this type of thing, and lifestyle its best that you look for somewhere else to work, and not apply... this way your not wasting the company's time and resources, and your not wasting your time either...
Employer's have all kinds of reasons for having a drug free work space... insurance cost, workman's comp., safety of all employees, image of their company, alot goes into this. Some have personal reasons for it... It's their company, their rules...
I have worked in both environments...and 100% working in a drug free work space is for me... I worked in a client service industry, where we had direct contact with clients, and customers... when someone comes back from lunch so high that they can't form a sentence, much less focus on what is happening around them, or do their job and guess what, someone else had to do it, and they still got paid...
True story... I walked into the restroom after lunch one day, and found a young woman lying on the floor, unconscious, in her own vomit, she was OD'ing.. I had worked in health care so I had some very basic skills, I opened the restroom door, and My boss said I screamed code blue, which I don't remember, I was calling 911, I turned her on her side so she would not choke to death on her own vomit, then I saw the blood from where she hit her head, my boss came in and was freaking out, and he said I told him to shut up, and get me something to press on her head to stop the bleeding... I totally focused on the 911 operators voice, Is she breathing... Yes.. I can just barely see her chest moving, Check for a pulse, I could not find it at her wrist, I did find in at her throat, its was thready, weak and slow...can you do CPR, Yes I have been trained, is there a AED... Yes someone has gone to get it... Thankfully paramedic got there they had to give her narcan, several times... I will tell you it seemed like a life time, from the time I called 911 to when the paramedic arrived was only 5 minutes... Once they got her stabilized and transported... The paramedic, said you did good...and with that, I sat down and cried... I found out later that she had come for an interview...and that she had smoked a little weed, that was laced with fentanyl... I'm not sure if she knew it, or someone did it without her knowing... so for me the phrase "it's just a little weed" doesn't cut it..
Our friends have a fence and landscape business... their maintenance person, fell off a ladder while changing a light bulb in the office, broke his arm, and collar bone, and had to have surgery, the drug tested him and he was high, on weed... Well that cost them, a ton of money... they had to foot the workmans comp bills, pay all the medical, prescription, therapy, plus he was getting 60 percent of his salary that they had to pay... then on top of that the workman's comp insurance that they have to carry, the premiums went up.... If this was your business how do you think you would react? Would he have fallen off the ladder if he had not been high... that can be debated...
I have a artist friend who smokes weed, he said it help him get creative, relax and get into his work... he works for himself... so he's the boss and makes the rules..