Really, you don’t take drugs? You don’t drink alcohol or coffee, or use medications like Tylenol or antibiotics? And if you don’t, you really can’t imagine doing these things in front of your son? And you consider doing so akin to child abuse?
You may think I’m arguing a small point but I think it’s a very big point. We’re talking about drugs: we encounter them daily in our society, but if we misuse them we can suffer serious lifelong problems (if not death), so it’s extremely important we make responsible decisions about them. No one can make responsible decisions about anything if they’re confused about the issues involved.
Drugs are substances which physically affect our bodies. Drugs have negative and positive effects. Drugs interact with other substances in our body and other individual factors (meaning, with every drug, there are some people who will respond differently from the norm). When you take any drug, you should (1) Make yourself aware of all the possible effects (2) Take the recommended precautions (3) Observe your reactions (4) Be mindful not to develop a habit or addiction (possible with all drugs), and (5) Speak with a medical professional about your use. This is true of all drugs: illegal, legal, medical, recreational, even “natural” (like coffee).
I’ve found when people start focusing too much on the distinction between legal/illegal, they stop thinking of legal drugs in the above ways.
So, I suspect your problem isn’t with the drugs, it’s with the illegal behaviour. Certainly, it’s not ideal, modelling illegal behaviour for your kids. Personally, if I had kids, I would keep my illegal behaviours secret from them until they were adults. I think it would take a lot (I mean a LOT) of reasoned conversations to combat the “monkey-see monkey-do” reaction. Hopefully, these parents are taking the time (and will continue to take the time) to have those conversations. And if they’re not? That’s a shame. But either way, is it akin to child abuse? I think that’s a ridiculous proposition.
Or, wait, maybe your problem is this drug causes inebriation, thus potentially places the child in danger due to poor parental supervision? Alcohol causes inebriation, too; I’d actually argue that, in excessive amounts, alcohol is more threatening than weed (in moderate amounts, I’d say they’re about equal). Do you also think people who drink alcohol in front of their children are abusing them? Another ridiculous proposition IMO.
Or maybe you’re concerned about the second-hand smoke? I am, too. I even feel uncomfortable with the idea of weed or cigarettes being smoked in the same room as a pet! It’s a consent issue, to me: adults can choose to endanger themselves, but children and pets aren’t able to make that choice, so the adults in charge of them should choose the safest option on their behalf. Personally, I would encourage your husband’s friends to smoke in a different room from their son. But if they say no, they say no, and again, it’s ridiculous to suggest this is child abuse, IMO.