Here's a story for you, BB;
Years ago I was running a team that was at a WC. Things went pretty well, we got a fourth and some nice team-work was played out. Our fourth-placed rider got called for doping control (no big deal), but before that the randoms got announced while the last kms of the race were happening. One of our riders got called up.
This was a rider who apparently had asthma. That was what I was told, but the only time I saw the rider puffing was on race days. And not a little, I'm talking multiple 'shakey shakey puffs' on big days. This was a big day.
Anyhow, the rider got called for random. I grabbed the rider after the finish and told them that they'd been pulled for a random and that we have to go over there NOW. The rider's face blanched, but they came with me to the doping caravan.
We made our way over to the caravan to check the posted names and numbers, and we got turned away by a WADA official who told us that the random-call requisites were fulfilled. No test for our rider.
The rider turned to me and said, 'Whew, well that was a close one, eh XXX?'. I had to reiterate our team policy on doping (test pos, get fired). And this was a team that was 'clean'.
I can't imagine what the top-tier go through...