I read this news recently and had to share.
Basically because weed has been made legal in Canada since October but the American government hasn't yet they can get in trouble at the border and be turned away.
The privacy Commissioner of Canada released a "guidance document" explaining to the citizens why they should be careful who they hand their data to and should try and pay cash as much as possible (or crypto?).
Since retailers are required under the Personal Information Protection and Electronic Documents Act to inform individuals about what information they collect and to which parties they disclose it to, they are encouraging every citizen to ask before hand when not paying in cash.
I love Canada even more after reading this.