You can hardly blame the sports media for overhyping, at every single possible occasion, the importance of public smack-talk by teams before they play an important game. Not only does it make the media’s job of filling inches and radio time that much easier, but it also lets the media feel like they’re part of the game now, even when they aren’t. Whatever “bulletin board material” comes from the pre-game interviews probably has about zero effect on the game itself.
That said, if you’re going to question a team’s credentials, don’t do it if they’re eight seeds better than your team, and really don’t do it to the point where you suggest their team’s no better than yours. Coaches (and 99% of America) know this, and that’s why their players are coached to be boring, generic talking point robots; let’s keep the embarrassment on the court, etc. etc. But then there’s Maryland’s Greivis Vasquez, whose only problem has ever been, um, “caring too much.” Someone asked him a loaded question about Memphis’ strength of schedule, and the star Terrapin answered with the kind of honesty that makes coaches want to quit.