Additionally, most of the testing protocol is up to the discretion of individual schools (leading to widely different testing frequencies and penalties). What is allowed is advance notification of a test (two days is the current maximum) which is plenty of time to get clean and dilute a sample.

Will Grier was probably busted for coke, not PEDs (at least, that's the rumor. Officially he was just busted for a vague controlled substance).

And there's no way the Clemson FB players were the only ones on gear last year. If you believe that, then I have bridge to sell you.