I mean, it's not just my opinion https://www.washingtonpost.com/news/the-watch/wp/2015/08/04/federal-appeals-court-drug-dog-thats-barely-more-accurate-than-a-co

I mean, it's not just my opinion https://www.washingtonpost.com/news/the-watch/wp/2015/08/04/federal-appeals-court-drug-dog-thats-barely-more-accurate-than-a-coin-flip-is-good-enough/ https://www.washingtonpost.com/news/the-watch/wp/2015/08/04/... https://www.npr.org/sections/thetwo-way/2011/01/07/132738250/report-drug-sniffing-dogs-are-wrong-more-often-than-right https://www.npr.org/sections/thetwo-way/2011/01/07/132738250... Dogs are not complex animals, and they are rewarded for positive indications regardless of whether the person who is searched actually HAS drugs or not. Since you have a constitutional right not to have someone just point at you and say "Hey, lemme search your bag because I don't like your face", they are basically an excuse to search whoever the cops want.