Michael Mørkøv has written a blog entry @ Danish TV2 (in Danish):
http://tour2014.tv2.dk/2014-07-15-rytterne-behandles-som-kriminelle
It's well-written, and pretty nuanced considering it's written by someone who's still in the peloton. I can't make a translation but he's basically concerned about the blood (or bio-) pass. Some riders are tested in the morning, some in the evening. Some are tested right after a meal, others after a period of fasting. Some are tested while they're healthy, others while they've been sick for some time. 
He says there are so many variables, and although all those variables are supposed to be taken into consideration when evaluating the blood pass he still has a feeling that everyone could be brought down. All riders are criminals per se until they can prove themselves innoncent.