Here is the thing about ph's, anabolic steroids, designers, etc. They are a tool, not a means to an end.
With proper training and nutrition supplements, or in this case, pro-hormones can help someone in their quest to improve their physique/strength. However, they are not magic bullets.
I know guys who used to do serious juice (injectables stacked with hardcore orals such as Anadrol) and workout like animals, and as a result they were the some of the biggest guys in the gym. Some of those guys don't even train anymore, and you know what? They look like anyone else who doesn't work out.
So while they were something to look at while they were juicing in the end all of those drugs have not benefited them at all. Hopefully those guys did things the right way and they are not suffering from hormone problems, hardened arteries or any of the other issues that misuse of steroids can cause.
Odds are that your friends are heading down a similar path. One day they will just look like any other schmoe, except maybe they will be on testosterone replacemet meds, blood pressure pills, etc.
The pitiful thing is that young guys that age rarely know **** about training and nutrition(they usually think they know, but odds are they don't). If they would focus their energies into learning how to eat and how to train, they would have fantastic results. Couple that knowledge with staple supplements such as Creatine and BCAA's then they would really see some great gains.
Be an example, not a follower. If you love bodybuilding then learn it inside and out. Apply your knowledge to build your body, and be a leader. Save the hormones for when you are older, wiser, and have a solid foundation of knowledge/physical development to take your physique to another level.