The regulation counts 58 000 words.
The regulation counts 58 000 words.
IIRC almost _half_ of the actual regulation is about what and how the member countries should set up their internal supervisory authorities and the rest is similarly specific.
There are innumerable checklists, summaries and guides on how to deal with GDPR as well.
The two I like are:
https://blog.varonis.com/gdpr-requirements-list-in-plain-eng...
and
https://ico.org.uk/for-organisations/guide-to-the-general-da...
Is a hash of an IP address PII?
What makes it "invalid"? If you can identify a person by their IP, then the IP becomes a part of their personal data. For most websites it's irrelevant, because people just visit and leave. But if someone signs in with their real name, you just need to update the ToS saying that apart from their other data you also store their IP. How complicated is that?
On the other hand, if you plan to sell the IPs associated with some other data to a third party that can easily link it to people (Google and Facebook can), you may want to consult a lawyer.
Can I still have a forum where users submit text?
Those of us in fields regulated prior to GDPR are laughing at you.
If you have to charge money, your chance to overcome the network effect of FB or an established site is difficult, because en masse migration of users to a new service typically goes hand in hand with that new service being offered freely.
Conversely if you don't charge money, your ability to fund the development of a competitor is based on reduced ad income since you can't offer targeted ads, which is going to shorten your runway by a significant amount.
These two things seem to indicate that the likelihood of building something that replaces one of the existing social services goes down. I don't think it makes it impossible, but the law seems to make it less likely that the social app incumbents get replaced (if that was at all possible).
As far as those in other regulated fields having done this for some time, I can't think of many regulated fields where the network effect is so high as social apps, so it is probably a bit apples to oranges. Presumably it is not as large a deal in those markets where social network dynamic is not as strong.