Good point Knapp, I saw the same Tweet by Christopherson today as well. It's more of a un-written rule, kind of like how B1G schools don't go after other B1G coaches. It's not applauded or favored, but it can and might happen.
Also, Frazier being a jacka$$ or not, should not be criteria for the Hall of Fame. If that's what's keeping him out of the Hall of Fame, that is wrong. Being a jerk should not be criteria in keeping one in or out. I've heard stories on how he was a jerk, and I've heard the opposite. It depends on who you ask. However, that made him such a great leader and competitor.
Frazier was not well liked among his teammates, but he was respected by his teammates, and they went into battle with him knowing he would be there for them and Frazier stated he would be "nothing" without his teammates.
What should either get him in or not, is what he did on the field. His resume speaks for itself.
I expect the same "on the field" criteria to be held to the same standard for Alberts, Crouch, and future prospects like Suh and whoever else might be eligible in the future.