[bmer]

Reasonable means for example, this: https://curia.europa.eu/jcms/upload/docs/application/pdf/201...

Dynamic IPs were considered as possibly being personal info, since a law existed which could allow an entity to connect dynamic IPs they have connected to other information (from an ISP), if they believe that connections from the dynamic IP are undertaking cyberattacks against them. Proto-GDPR actually considered collecting dynamic IPs in this case reasonable, and it was a specific German law that was more restrictive. The main question thus became: should proto-GDPR be used, or the existing more restrictive German law? Going off topic though. Point is that "reasonable" is used not as a mathematically precise definition, but in a human language sense of "reasonable". If you don't get what reasonable means, then I am sorry to say that in the case of law, you will generally have to suffer what most people consider to be reasonable in spirit.

In other words, you have a problem with all laws in general, since they are not nearly precise enough for you.