I see what you're saying, and as a non-Steeler fan I can see where a lot of people are probably fed up with him, but I've been a fan of that guy since he was a little known special teamer in 2004. And he's pretty much gone from barely known, to a solid up and comer, to a household name in a very short time span. If you check back on him his attitude cost him a major scholarship at a big school, and that's why he played at Kent State (which any fan of the game should know that's where Jack Lambert went, but that by no means is any indication that they're a solid college-to-pro school). The guy is actually a good role model in the sense he's shown that if you never give up and keep working hard for your goals, then great things can happen, but that's where the true role models in a kid's life (parents, older sibling or such) should step in and say "just don't mind his public speaking".
Like I said, the guy is who he is, no surprises. Call him childish, a poor role model, whatever anyone wants to, everyone is entitled to an opinion. I've spoke my peace being a Steelers fan, and honestly I wouldn't want to see any other ROLB in the League on that team. The guy is talented and just a complete beast.
And me, I'll be 36 next week. At work, I have no problem telling one of my supervisors if they're being a back stabbing snake-in-the-grass, a foul-mouthed POS who can't talk to people, two-faced, or whatever, to their faces. A lot of them actually have more respect that you do that instead of blowing smoke up their rear ends. I just have the luxury of being able to do it behind closed doors or whatnot, these guys playing the game don't. The only time they get a chance to speak their minds or express their feelings about it is to the media. Harrison isn't the sharpest cookie in the box, he falls for all of their bait questions, every time.