I Don't Know Nuthin'

I've been thinking a lot about how people learn and how people teach lately.  It's a constant theme in my home, as my husband is a school teacher, I teach my kids stuff that moms are supposed to, I teach Sunday School, and other teachy things.
There are several ways people learn. I think a lot of it has to do with how people teach, or their communication skills.  For example, I know this kid* who's barely old enough to be in college (though she isn't and has never been) and she writes this blog to share her wisdom.  I also know someone* who's a bit older (than me) and he love to "one-up" people on Facebook and blogs.  Like if you write, "I have a headache!" he will write "Me too!" or if you write, "My friend brought me cookies," he will write, "My spouse makes the BEST cookies!" You get the point.  Another example of this is that there's yet another person who is always right.  No matter the argument, they are never wrong and only admit defeat if it's absolutely the last option.
These three people teach in ways they may not think about.  The first teaches arrogance through trying to appear wise.  The second's one-upmanship is annoying, at best, and teaches you to not post anything that will give him an inch.  The third is a bubble bursting with pride and teaches that it's not smart to disagree with them, unless you have all day to fight every possible argument.
These really aren't lessons people want to learn.
What's tough is that usually people don't know they are teaching these things.  I recently was reminded that I am person #3 in this instance, something which is told me every few years, I try to work on, and then forget about until they tell me that's my issue again.  I'm pretty sure that they are wrong, though. Let me figure out a loophole.