So when I get reported, I'll say I didn't worry because some guy on Hacker News said I'd be OK? That's not how it works. You can be as confident as you want without affecting the reasonable worries actual businesses have about this regulation.
Please, don't take my words as granted but talk to an actual lawyer. You'll probably even find a free session for startups somewhere in your city, at least in Europe.
https://ico.org.uk/for-organisations/guide-to-the-general-da...
https://ico.org.uk/global/contact-us/advice-service-for-smal...
What hav the Danish & Belgian regulators been doing lately?