It doesn't take much to conceal it, though. As long as you aren't a d-bag who screws over your trainer (coughclemenscough) then everyone is going to cover for you. Just watch the MLB Network; most of their studio guys were active during the Steroid Era, yet they all act like nobody they knew/played with was doing anything. We all know this is complete BS, but the fraternity of professional athletes generally doesn't rat each other out.