And then the exception will evaporate overnight.
Precisely. Courts will find that the situation where Linux users are exempt from the law, whereas Windows users have to submit their ID and any other personal data, can not be maintained, so Linux users will also be forced to give up their ID before being able to access the internet. This will also first come via commercial distributions (perhaps it can not be enforced by independent linux users, but the law need not necessarily work for 100%, could be 95%, and the rest are declared as breaking the law).
One gotta love politicians and their "solutions" and their longevity.