I didn't say it was a new thing. NPC groups would suffer in terms of membership if fraternal groups adopted NPC alcohol policies.
My point was that while you want to blame alumni for not getting the message, we know exactly what the issue is. Sigma Nu tried to pass an alcohol free housing initiative in the early 2000s. It was overwhelmingly defeated at our Grand Chapter. It's a non-starter, never going to happen.
We use education by mandating members take the alcohol.edu course every single year (maybe every semester?)
No amount of education, well-meaning rules, or threats is going to stop 18-21 year old people from overconsuming and doing stupid things. It's a force of nature.
What you can control at the end of the day is how well your organization reacts when someone does the stupid thing. That's where alumni can be helpful. It's also where alumni can be very unhelpful
https://www.youtube.com/watch?v=keTbsSfMOdI&t=47s [whether that was allowed by alumni or perpetuated, it wins that category forever].
But blaming alums for 18-21 year old kids doing amazingly terrible things? Nope.