Well, there are two very obvious ones. But I think they stopped because their bodies were getting ridiculously large. Specifically their upper bodies. One guy reminded me of SpongeBob Squarepants. His upper body was HUGE and thick. But his legs were little toothpicks. But yeah, he stopped. He kept most of the mass and he looks more normal.
The other juicer is gay. I think he started juicing to get more cock. But it seems like it backfired. After he got huge, I stopped seeing him hang out with his gay gym buddies. Also, from my observations most gay guys don't like roided out bodies. To each his own, I guess.
I do see a handful of older gay guys on HRT. Nothing crazy like SpongeBob. They keep it reasonable and they look pretty damn hot.