Well they shouldn't cheat. They've got form for it right down the decades, and you'd think it would be obvious to them by now that any wins they do get are tainted by association. Also as you say, East Germany when they were under Russian control, producing female athletes given shots of male hormones etc. Just outright cheating. How else would such a small "nation" have gained so many gold medals at the Olympics? Of course it never worked with football, nor could it. Hence their singular lack of success in that direction.
Athletes should stick to altitude training. It's very effective and 100% within the rules.