That’s not how I interpreted the ruling from the case you linked, although I’m not a lawyer:
Article 2(a) of Directive 95/46/EC of the European Parliament and of the Council of 24 October 1995 on the protection of individuals with regard to the processing of personal data and on the free movement of such data must be interpreted as meaning that a dynamic IP address registered by an online media services provider when a person accesses a website that the provider makes accessible to the public constitutes personal data within the meaning of that provision, in relation to that provider, where the latter has the legal means which enable it to identify the data subject with additional data which the internet service provider has about that person.
Additionally, from a cursory read, it appears like they are only talking about dynamic IP addresses anyway, but you, as a service operator, have no way of knowing if an IP is dynamic or static.
This is the key:
...where the latter has the legal means which enable it to identify the data subject with additional data which the internet service provider has about that person
Article 2(a) of Directive 95/46/EC of the European Parliament and of the Council of 24 October 1995 on the protection of individuals with regard to the processing of personal data and on the free movement of such data must be interpreted as meaning that a dynamic IP address registered by an online media services provider when a person accesses a website that the provider makes accessible to the public constitutes personal data within the meaning of that provision, in relation to that provider, where the latter has the legal means which enable it to identify the data subject with additional data which the internet service provider has about that person.
Additionally, from a cursory read, it appears like they are only talking about dynamic IP addresses anyway, but you, as a service operator, have no way of knowing if an IP is dynamic or static.