I totally agree.
I've experienced it myself, I've seen it in others. It should stop. And also, going to a psychologist once a month should be obligatory from the end of primary school. But that's another story.

Maybe they do get the social cost of their behaviour. We may never know. Maybe the ones around them see this, and hence act accordring towards them. Maybe now, maybe later in life.

Haha :) Actually we shouldn't apologise for that. When we have something on our mind, we should express it. And not be afraid of boring others, etc. There are times where we should stfu, and some should be locked up for their words and thoughts, but I think you know what I mean.