As you suggested, all I meant is that once you have a fully anonymous currency it’s always possible to deliberately weaken that privacy if you want to. I think that sort of decision is up to the currency adopters. But to be clear, that kind of feature is absolutely not included in ZCash. Anyone who implies so is selling FUD. Since the ZCash code and design is fully open source this is easily verifiable, and plenty of people have looked.
For the record: as a researcher I deal with a lot of people who’ve told me that privacy technology is fundamentally dangerous. One standard response I give them is that this is crazy: a fully private currency is the right starting point. If you want to make a fork of ZCash that has less privacy, you can do that and I won’t stop you. But that isn’t ZCash.