[WaitWaitWha]

What is the legality of poisoning publicly accumulated databases?

What is the legality of poisoning non-publicly accumulated databases?

(I understand there are jurisdictional differences, so if you be kind mention in what jurisdictional framework you are writing about for my learning.)

[salawat]

You're not going to pollute VISA/Mastercard without running afoul of identity theft/wire fraud charges in the United States.

Any other datasets are only going to attempt to "enrich" their own datasets with other datasets. This is why Plaid* had such a strong value proposition in spite of their completely unethical business practices.

The other big brokers of datasets out there (LexisNexus, etc...) go to incredible lengths to rake in any possible public record out there.