One of the most infuriating thing for me was having my biometric information taken and shared at all the the competitive examinations' test centres. To get into college, I had given 5-7 online competitive exams (JEE/BITSAT/UCEED/etc.), and at each centre I had to mandatorily have my fingerprint scanned. Their reason was probably to prevent cheating, but I won't be surprised if my fingerprint/name/phone number/address is out their being sold.