What are the disadvantages of QR codes?

Related questions

1. Are QR codes safe to use?
2. Can barcode scanners read QR codes?
3. What's the point of QR codes?
4. What is the future of QR codes?
5. How can QR codes be used?
6. Are all QR codes unique?
7. Are QR Codes dangerous?
8. Can QR codes replace barcodes?
9. How are QR codes used?
10. Can QR codes be reused?

Tags

1. #smartphone
2. #cannot
3. #connection
4. #disadvantages
5. #codes
6. #required
7. #obvious
8. #disadvantage
9. #internet
10. #scanned
11. #there