If they can get what they want from this, they will not stop after they get it. Even if the authors of the law want it to stop here, their successors will not, and will build upon this to erode privacy. When governments can change the deal effectively unilaterally, as is the case, you cannot make a deal with them that they cannot change, and you will have already surrendered the strongest argument against the next "deal" they want to unilaterally impose. Do not treat this as a deal to prevent further erosion, that is not what this is, treat this as an attack and attempt to advance against privacy and anonymity. Treating it as anything else is absolute gullibility.