There are some who obviously juice and look good but when you ask them what their cycle is like, they don't say anything.
Most juicers are in denial about how much of their build is drugs, so they never give out dosages. Others just don't want to explain themselves to others because most people reticule AAS users.
When i used for many years i got asked a hundred times if a took steroids, i always said no because it is no ones business other than my own and i got tired of defending my choice to uneducated people on the matter.
Feel free to ask away on the gear board, most of us are willing to share anything if you have an open mind.
I think the ones you are talking about are the gear users who claim natural status, so they obviously dodge your query because they are in denial.