[noja]

> with a paranoid-level of lists added to my pihole

This is your regular reminder that many websites you are visiting are proxying your data to facebook for them. There is no host to block here.

Check out the Facebook Conversions API Gateway.

[BLKNSLVR]

Does uBlock Origin block this by default?

If not, what are the counter-measures?

[noja]

No and none.

[BLKNSLVR]

Well that sucks, but my pihole still makes a huge enough difference to my internet experience that I can usually immediately tell if I'm not behind it.