Oh, come on, buddy! You think a coach is going to go up to a player and tell him, "You know, you're not really that tall/short. You need to put down your right height"?
If you say you think a coach should, I'll be reminding you about this in 10 or 15 years when I see the weight your wife's driver's license after a couple of kids and a lot of long work-days. The last people who should be complaining about people listing wrong heights are married men!