> Never scan QR codes: There is no evidence of widespread crime originating from QR-code scanning itself. > The true risk is social engineering scams... Exactly. My grandma is very susceptible to phishing and social engineering, I don't want her scanning random QR codes that would lead to almost identical service to the one she would think she is on and end up with identity theft or the likes. > Regularly change pass…
The point is to use unique passwords. If there is a leak, hopefully it is detected and then it is appropriate to change the password.