Would you mind explaining that? I'm pretty certain doing this would get you in trouble with a range of other legislation around the EU and put you in line with

Would you mind explaining that? I'm pretty certain doing this would get you in trouble with a range of other legislation around the EU and put you in line with similar PR nightmares in the past but I don't really see how MAC addresses alone would be covered by the GDPR (at least not in the text/precedence I'm aware of).