I used to boo as a student, but I really haven't booed too much the last two years as a grad. I'll still tailgate the same and cheer with the same intensity, but I'll probably avoid the booing & the disrespectful smack talk.
I understand both sides of this argument. Once that game starts, it's fair game, but it's like that with every opponent and every has a choice for how they cheer/act during a game.
(If the people in my section heard me saying this, they'd probably call me the biggest hypocrite in the world, because last year I nearly had a couple meltdowns, broke beer bottles and spilled nacho cheese on a dude that sits in front of me.)