Even if they had a privacy policy, if the data leaked, that policy would be irrelevant. This is an additional problem on top of the obvious problems with mass

Even if they had a privacy policy, if the data leaked, that policy would be irrelevant. This is an additional problem on top of the obvious problems with mass surveillance. You have to trust the Observer to have an appropriate intent. You have to trust that they can secure the data. You have to trust that they will not hire a malicious person Who will misuse their access to the data. You have to trust that they won't be sold to a company that will revoke all of the above considerations. This is far too much to trust, and none of it is in the control of the observed.