This was raised in #1158.
This was similarly raised in WordPress. See:
Another thing we should do is provide some API or hooks to generate the P3P compact policy dynamically because plugins (or a site's specific usage) may materially differ from the stated policy. (The simple fix is to make this a config setting in the [Tracker] section.)
P3P: CP='OTI DSP COR NID STP UNI OTPa OUR'
I'm envisioning this will be two parts:
Anthon for any feedback please lets discuss by email!