I grew up in the 80's. The 90's is kindergarten in comparison.
You can definitely tell who are not parents. When/if that time comes you'll be able to relate better. You can't have your children in a bubble, but you can't have people running around acting with total disregard towards children and public places.
I have 2 young children and you're absolutely right. You can't protect them from everything, and should be able to talk to your children and explain certain things to them. Generally, I find most of the people sitting around me aren't too bad with the language. However, when someone starts going off, and my 5 year old starts asking questions, I explain the situation and my expectations that he doesn't conduct himself in that manner. He listens because, if he didn't, I'd punish him.
As far as the "you suck" chant, I generally didn't have a problem with my son doing it. For example, early in the 2012 season, I brought my him to a game and the Devils scored. He's cheering and clapping along with the goal song and I caught him do the "Hey...you suck" for the first time. He immediately knew what he said was wrong and looked at me with the "I'm sorry...please don't punish me" look. I could have scolded him, but instead I explained to him that it was a chant at a sporting event and what it actually meant (suck = stink). I then proceeded to tell him that it was ok to chant at the Devils game because, as a parent, I didn't feel like this was a big deal. That was my choice as a parent, and everyone must raise their child as they see fit. He was cool with that and, to this day, he will only say it while at the games.
Also, I love how entrenched the Devils ownership is with this. They obviously underestimated the reaction that they would get with this change. A large part of me wants to just move on at this point. But I can't say it won't be interesting to see if they will ultimately cave to the overwhelming public sentiment if the objections to the new goal songs persist as the season moves along. No matter what, I think it is safe to say that any goodwill they came into this situation with after purchasing the team from JVB is largely gone. Not a great start to the Harris/Blitzer regime from a fan relation/PR perspective, that's for sure.
I thought it was Avery pays for it, but that might be a dated version of the chant.
I believe it was "Avery gives a reach around, Crosby watches, and Henrik cleans up afterwards" ... or something to that effect. Just ridiculous.