Okay... Personally, I feel that 90% of all players during the "Steroid era" and about 75% of players now use some form of PED. I wouldn't be the least bit surprised if any member of the team (except Kawasaki) tested positive today. We have a guy who was CAUGHT doing PEDs on the team right now.
Zaun's entire steroid allegations stems from a single receipt with his name on it in the Mitchell Report. That's IT. He never tested positive, there's no huge paper trail, there's no eye witness testimony for him. A single receipt with his name on it.
Melky tested positive, Zaun once used a pen.
Don't get me wrong, I'm sure Zaun was a juicer (see my "I feel that 90% of all players..." comment above) but because he was an afterthought designed to pad the numbers of a congressional witch hunt doesn't make him automatically unqualified to complain about JPA being terrible at baseball.