Most people with half a brain know that professional bodybuilders, fitness models, athletes, etc. - all use AAS. People are always giving them shit for lying and claiming natural. Calling them frauds and fake natties etc. Mike O'Hearn for example...he is juiced to the gills but has been ridiculed by the bodybuilding community and fans for claiming he's all natural.

I think these guys SHOULD lie and claim natural. Not just for their sponsors/endorsements etc...but for the kids who look up to them. Kids believe the natural claims, and it makes them believe that they can achieve those results with just hard work. If they find out at a young age that you need steroids to look like that then they are likely to either:
1.) Give up
2.) Use steroids at a young age

For example...lets say 12 year old you idolizes Dwayne the Rock Johnson. You work out for a few years trying to look like him and make decent gains but obviously you are still far from your goal. Now you're 15 years old and browsing the internet on bodybuilding forums and whatnot and reading all these people saying how The Rock is using steroids and so are all the famous bodybuilders and fitness models that you have been looking up to. Now you know that the only way to reach their level is by using steroids. What do you do? Keep going naturally knowing you will never get past a certain point? Give up because steroids are out of the question? Or jump on gear at 15 because you are so determined to achieve your goals?

Let the kids believe they can achieve these things without gear. Let them train hard, eat hard, and stay natural as long as possible, because once they find out the truth things will get complicated.

They cant tell the truth from many reasons . They all have huge contracts with supplements brands , they are like super heroes to all beginners and if they tell what they take all kids will do the same, is also a bad image to our sport telling we are only pharmaceuticals .