

In practice, it’s impossible to determine the purpose of purchases. If someone talks about their experience of buying from a dealer without further context, you’d have to narc. Or, you open yourself up to legal liabilities.
Besides, people buy on behalf of others all the time. People share with others. Substance use is often not a solitary activity. This law would create a situation where it’s risky for you if you do not narc every time.
I am here with you. Though you’re far away, I am here to stay.
Etc. And so forth