To be clear, campus security didn’t actually hang out and watch parties. The hosts were supposed to manage their own parties (within boundaries set by the university). And I’m not saying Stanford’s policies were perfect or even close. But I do think they did a decent job of letting students host parties on campus with keeping a degree of awareness of what happened on campus.

Stanford was also known for allowing students to drink with friends in their own rooms, in undergrad dorms, with the doors open. It was quite strongly discouraged to close the doors when drinking. These weren’t “parties” for these purposes. I think this was an excellent policy — it encouraged being social, it helped keep everyone safe, and it steered undergrad drinking in a more mature and safer direction. Sadly, IMO, this is no longer the case:

https://stanforddaily.com/2021/09/20/from-the-community-stan...

I don’t know how the actual bureaucracy and effects of the policies have changed since I was there.