[sinsterizme]

Let’s take a hashed IP address.There are 4.3B ipv4 addresses. So a few minutes on an old laptop to generate a rainbow table. With decent hardware it would be seconds. The rainbow table could then be used to identify all the IPs you store. If they are salted, then each IP would need to be brute forced, but still only seconds on good hardware

[tracker1]

That would still take collaborative data from another dataset outside this product. Compliance would be up to whoever hosted this, and the collaborative data set to comply with the request anyway.