100% correct, actually most of the time, the beer effect is applicable to off-the-ice fist fights as well.
I've never understood this whole fighting is 100% bad mentality. We are animals, the product of evolution. We have plenty of traits still with us that meant the difference between life and death on the Savannah's. For some reason, some people think that these traits (such as aggression) are legacy things that are not needed any more. I'd argue that many of these traits are not only needed, but just as important as ever.
I also, think in these days of "think of the children, can't we just hug our problems away, lets form a circle and sing Kumbaya" we simply do not get a chance to properly (practice/hone) these skills/traits and sports creates an artifical environment where we can exercise these traits.
I'm not saying that there are cases where people have REAL issues with aggression, but I'm definitely NOT on the contact sports are evil camp.
You don't like contact sports? Don't play them, but also don't try to force your opinion down everyone's throats. There's all sorts of activities/choices that are proven to cause harm to the body and mind, sitting on your ass in your mom's basement all day, with the only social face-to-face contact you've had with a living human, other than your mom, was six months ago, is probably the worst of them.