Out of interest, why are professional athletes tested for recreational, non performance enhancing, drugs in the first place? Let alone liable to serve lengthy bans if caught. It should be a disciplinary matter for their employers (particularly if it is a performance impairing drug) and it may be a legal matter (although I'm personally inclined to legalise drugs).
Sporting bodies have a responsibility to test for performance enhancing drugs in order to maintain the integrity of their competitions, anything else is none of their business.
Market Harborough Food and Drink Festival in the rain
7 minutes ago