I'm sure HGH is abused, but its supposed to be prescribed when you child's mature height estimate is not expected to reach a certain height. I recall for girls it was in the neighborhood of 5'0", but don't remember what it is for boys. Both my kids went through the monitoring of their bone age for a few years (hand x-ray), but didn't end up needing HGH. Their bone age was just 2-3 years behind their chronological age. My son is 5'11 now at 16 and could continue growing until he reaches college. My 20 year old daughter never made it past 5'1".
Before you judge parents that have kids that take HGH as losers, consider that it has legitimate medical use for kids that are projected to be abnormally short. Are Messi's parents fucking losers? He had an extreme growth hormone deficiency and was projected to only grow to 4'7". It seems to me they made a great decision to help their child through teens and adulthood. It's not like it made him a giant at 5'7", it just made him a couple inches below normal height, instead of 14" below normal.