But "filtering out" would just need to be reducing ad targeting, not suspending the accounts, so some level of false positives might be fine if you can get a lo

But "filtering out" would just need to be reducing ad targeting, not suspending the accounts, so some level of false positives might be fine if you can get a low enough false negative rate. The goal of the companies in this hypothetical is to limit systematic statistical detection of ad targeting, not to suspend automated accounts. If a small enough percentage of human users' ads are less/not targeted, no big deal.