I believe your being down voted because it is common knowledge that food service legislation only applies to those selling food, and therefore intentionally doesn’t apply to dinner parties.
If your European friend tells you their phone number and you write it down on your refrigerator (or your public blog for that matter), the French government isn’t going to come fine you for violating GDPR.
Is that what it says, or are you just saying they're not likely to enforce it in that way, and now we have a rarely enforced law that everybody violates and therefore the government can use it as a pretext to undemocratically destroy anybody that government officials don't like?
Wait, so you're saying it allows anyone to store and publish the personal information of Europeans? Without doing anything like have some way for people to contact you and request what information you have on them?