Hazing has "gone away", and if you've ever been in a "frat house" on a Christian campus, it's sorta like being at boyscouts camp 24/7... so yeah, I'm not saying all of them are BAD. But the tensions that arise between equals, and the competition therein, isn't the same as a loving household.
Lol I was a cub scout through boy scouts and went to every camp offered in my area every year and I can tell you from experience that yes, Scouts haze. Not in the typical sense but you're not in until you prove yourself. You can be a member and earn badges and what not without actually belonging to any group of friends. This is NOT to say that all troops are like this. However, this crosses over directly to the topic at hand.
Yes, Frats haze and roofie girls and do all sorts of awful things but at the same time, not all do. As with anything, some are always going to be better than others. I'm in favor of the frat itself having a fairly weak threshold, if any. Probably 0-2. But then the rooms themselves should have seperate thresholds. Remember that one of the parts of making a threshold strong is that you feel a sense of safety there. I know people on bad campuses who feel their room is their only safe haven and they cling to that. They decorate it and put love into it and love the school well-enough but when it comes to people, their room protects them. That would constitute a threshold being a bit stronger.
Let's continue with the friend I mentioned for the example. She doesn't live in a frat but rather a dorm so lets say the dorm has a threshold of +0 and the feeling of safety gives her room a threshold of +2. Now, she has a roommate who is a bit transient so that would lower it but her and her roommate love each other as sisters. so that adds to it. We'll say those cancel each other out (+2-2=0). They decorate and put up pictures and symbols of things that are important to them and really "move in" to the room. As people have said before, however, there is always that sense that they'll be leaving. Sure, they're staying for years but they know and look forward to the day they leave. That again, cancels. This leaves her room at +2.
Now, let's look at an ideal frat threshold without any wards or anything. The frat is at a very old college and has been established at the college since the foundation or shortly thereafter. The residents of the frat tend to be the youths of generations of alumni. They all have a sense of brotherhood and a feeling of safety in the frat. Going with the base of +2 and granting the generations bonus we'll say that's at least a +4. We'll ignore the -2 for being temporary because while yes, they're all going to leave, they feel they'll return, even if only through their children. We'll go further and say this is a no-nonsense school - Okay that that doesn't ever happen. There's always and animal house in some incarnation or another - no-nonsense frat. So parties aren't really happening so there aren't a lot of transients coming and going. This doesn't add anything so much as not subtract anything. Now let's say that again, the college has seen dark days and the frat house now gives an intense feeling of safety to the brothers. That would be a +2 and now you have a +6 to +8 frat house.