I believe Jon Jones was on a while back shortly after his USADA ruling. He kept insisting that he was PROVEN not to be a cheater and that it was the "dick pills" that were tainted. When I proposed that it may have been a planned "taint" (that sounds a little strange) because the tainted pills came in the same package as the banned substance, the guy stopped posting. I had to wonder out loud, in the responses, if it was Jones, himself, trying to "clear his name."
Planned Taint - to prepare an alibi with a known tainted product in case one is caught using the actual banned substance.