I spoke to numerous greeks at different schools, and of course, the reaction is mixed. As for drunk driving incidents, most chapters have sober sister and brothers who are the drivers. Or they have buses. Now chapters say, "well, we can't afford the buses". This is why all of the greeks should get together and get with one bus company who will give them significant discounts if they all use the same company.
As for third party vendors, the purpose of this is to reduce liability. The vendor is liable for carding, serving minors and the like. Yes, your organization could end up getting in trouble should something happen, but I truly believe that liability is greatly reduced.
Also, many organizations talk about "burn out" by sisters and brothers. When I was an undergrad 4 years ago, we had mixers every week. While some people enjoyed this, others didn't care for it. If organizations make their mixers events instead of an every week sort of thing, it could relieve some of the overprogramming by greek letter orgs.
I don't necessarily think the idea of alcohol free housing is what undergraduates have a problem with. The problem is that those that aren't 21 aren't going to be able to drink at their functions, and that is why the issue is fought.
I will say that our organization had a task force that reviewed all of the information before our resolution was passed, while many international councils just passed theirs without input from their collegiate members. Our resolution passed the task force unanimously. It's time for greeks to step up to the challenge, because this isn't animal house anymore