One of the best things that you have ever done is to ask first. The second best thing is listening to the advice of waiting. Let me try and explain to you why you got an overwhelming..."no don 't do it". First off the growth centers in your bones called ephyisis are not completely closed until around 22. D-bol will help signal that you you have plenty of test and growth is now over ,so begin closing the growth centers. When I was 18 I was 6ft. At 20 I was 6'1 and at 21 I was 6'2. So dbol may stop you right at your present height and if you have the genes to be 7ft you will never get there. You stop getting any taller.
Second problem-As soon as you begin puberty you begin producing high amounts of test.....this continues until you peak...which could be anywhere from 17-25. These are the years that you want your own test running the show. It is the best test and the most you will ever have in your life,so take advantage of it by eating right,sleeping well and lifting hard. If you introduce dbol to your system now then again you send signals to your brain that say overloaded ...way too much test...please shut down. The last thing you want to do right now is to shut down your own great test with some chemical. Most of us here achieved our goals way before we used anything. You don't really NEED anything. Once you have years under your belt you may say what is next...and then it is time to decide if you want to take the next step.
So for your physical potential right now stay clean. It will also be better for you mentally.The temptation will be there so this is your first lesson in discipline. Stay focused and pay no attention to the white noise yelling in your ears....esp from buds...and esp from buds at the gym. In just a few short years that will come fast you will be able to pick all of your buds up with one hand.