I think it is an a priori fact that the cat is out of the bag.
The existing publicly available datasettes, algorithms, and weighted models certainly should be expected to be permanently in the hands of some non-law-abiding parties, at this point.
I think that it will be important to ensure that we have symmetric information, going forward, otherwise trying to put the genie back in the bottle may just end up further disadvantaging those that try to follow the rules.