You'd be surprised. GDPR is vague enough and just open to interpretation enough that there are many different companies interpreting it in many different ways. I'm a consultant and I talk to many multi-nationals and all of them have their own spin on it. Especially around the "except when necessary for security purposes" section. That right there is broad enough that "security purposes" can mean almost anything as long as you make sure your security team has access to that data.
Either way, you shouldn’t be doing it out of fear. You should be complying for practical business reason
1. This is how you should be treating personal data. 2. In exchange for complying with GDPR, you get access to a market of >700m people. If you’re a service provider, it’s illegal for any EU business to be your customer without GDPR compliance.
The EU and politcians are anti UX, they have no clue about the effect of their laws on people.
"The first place" would be not collecting it, an option that companies are seriously considering for nonessential data that they previously collected merely because it was convenient and accepted to do so.
If you are big enough to have to worry about this you are probably a company with plenty of resources to think and comply with this. So it's hard to imagine how many readers of HN are getting their answers on HN (or similar). If you are small time nobody is going to come after you. Sure something could happen and you could also get a traffic ticket going 57 in a 55 zone and a host of other outlier events.
> AKA: be paranoid about keeping them, encrypt them, use SSL on your site, respond to requests from people if they ask if you have them, fix them if they're wrong, don't use them if they say you can't.
One size fits all advice doesn't make sense in this and in other similar cases. You will spend a great deal of time and effort dealing with 'maybe's' instead of the day to day.