I really hope this gets implemented during the next hak update. Hypatia is 4'10", Lianna is 7'1"... but IG we look the same. It would be really really nice to be able to adjust this for the sake of RP, immersion and variety.
I agree that it would be nice to do, but we'd have to keep things limited. Not sure what races you are looking at, but 4' 10" (well, 4' 7" for female) is the absolute min for humans, where as 6'6" is the Upper end (for males, only 6' 1" for females) , 7' 1" wouldn't probably be doable for a standard human (unless its some off-spectrum race from some setting).
I agree that I see a STAGGERING amount of people that are describes as massively huge. I think if this were to be implimented in times to come, were people to use the upper end of the scale, that OCR penalties would make sense. People being fearful would make them quicker to be blamed for things and otherwise untrusted.
Then you get to the point of where you stop the 'scaling' talk in general. Sure, height is one thing, but not only? Are you simply scaling the whole model? Some people are tall, lanky and skinny, some beefy... Do we add width scaling for more stout people or skinny people? Where do we draw the line in implementing such a system?