you can definitely tell people not to do certain things or use certain technologies and it mostly works. as a simple example, sometimes when getting access to

you can definitely tell people not to do certain things or use certain technologies and it mostly works. as a simple example, sometimes when getting access to a dataset, you have to sign a contract agreeing not to try to de-anonymize or identify any individuals included. both sides on the contract know it is possible and perhaps easy, but they're making a legally-enforceable agreement to prevent it. this sort of thing, or regulations enforcing similar restrictions on certain industries and institutions, is not the same thing as trying to outright ban any spread of a new technology or stop its use completely everywhere.