I have to ask: Why are you so incensed by what you perceive to be incorrect height?
This is Second Life. It is a fantasy. Some folks enjoy having avatars that look exactly like them in real life, some folks don't. Hell, none of the avatars I have remotely resemble me in real life, and they're all different sizes.
While I prefer to make a valiant attempt at keeping my avatar proportional (no T Rex arms here), I can certainly understand that folks less inclined to care about appearance will just slap together something that they can look at.
Do I mock people about their appearance? Heck yeah I do. It can be fun. But I don't seek out the drama.
The way you come across here and in your profile, I suspect you'd probably hate me anyway. My avatar is either Six foot Six or Seven foot One, depending on what height parameters you're using to measure.
Neither is my real height. In real life I'm an inch or two shy of six feet. Should I conform to your preconceived notions of what people should look like in Second Life and shrink my avatar down?
I'm really curious about this.