Maybe it will help you to understand why students shouldn't be gunners once they arrive on campus. Think logically for a minute.
As you know, law school is hella expensive, and distracting a prof - even with well-intentioned queries - retards the day's pre-planned lecture. That means that the prof doesn't get to cover all of the planned material, which lowers the value of the lesson for that day because the students didn't get to hear all that the prof planned to cover.
Students thus lose a lot of money when the lecture is held up by gunners, whose questions are, at best, usually of tangential value in the grand scheme of the course. The same questions are better suited for office hours. The rare instances in which students ask brilliant questions in class do not atone for this loss; moreover, such questions would likely be answered within the flow of the lecture and cold-calls anyways. And it goes without saying that your peers do not care to hear what you think about a particular issue. If they do, they will ask you outside of class or during study group hours.
As for some of the other gunnerish things people do, bragging, subtle attempts at intimidating other students, playing psychological games during reading weeks and after exams, ripping pages out of books, being rude during study group...do you really need to be told why those things make you a douche, or why other students will quickly want you to withdraw if exposed to your douchery?
Fear of recrimination for such acts should be enough of a deterrent for any student. If you want to be a gunner, do it here or online somewhere else (like the rest of us online gunners

). Your law school rep will stick with you forever. You'd be surprised at how small the legal community really is, despite its enormous membership. Word gets around.