STOP SCANNING RANDOM QR CODES

QR codes can contain links to malicious websites and files.

If you're not absolutely certain of the source of the QR code, proceed with caution and consider running the URL through a service like VirusTotal before actually browsing to it.

Avoid using the QR code scanner that is built into your mobile device's camera. These scanners typically automatically browse to any website in a QR code without showing you the URL first.

I recommend using a dedicated QR scanning app that has an option to display the URL before actually browsing to it.