Unless you are suggesting adults would buy you beer for you to take the ACT on behalf of a minor they knew. Which seems odd.
This country used to be a lot less uptight.
I know that one was training to be a dental hygienist, or at least wanted to be training for that. The other few didn't share as much, but they all knew each other so maybe it was the same thing?
I highly doubt I've harmed anyone by enabling their hygienist to get where she was without knowing the formula for the volume of a cone. As far as I'm concerned the gumption necessary to hack your way in is worth just as much as the gumption needed to pass authentically.
Not to mention, the drinking age being 18 was for a window of about 14 years in the 70s and 80s. (Unless he's from Louisiana)
Typically they know somebody who knows an adult that will to the transaction with the store and provide the id.
Otherwise, some stores accept good fake ids, or squint to believe that the person buying actually matches the picture on the card
The issue is that the people he claims are getting him alcohol would be in the same situation as him.
It might be harder now, I don't know.