Go Ahead. Scan That Random QR Code. What's The Worst That Could Happen? Actually, it's good practice to simply avoid QR Codes if you aren't aware of the risks associated. Unfortunately some Signal users learned that lesson the hard way, and let malicious QR codes give hackers access through a "linked device" feature Signal offers. Signal is a private messaging app often used by journalists and activists for its robust end-to-end encryption. But lately, Signal has been in the spotlight for reason