If you're tired of seeing absolutely fake news and trying to guess whether or not these sources can lie to you or not this is your solution. Got kids and don't want their brains full of lies? That's what this is for.
Basically, the criteria here is only outlets that post verifiably false stories. This is why Huffington Post might be on this list, but Fox News may not, etc. It's not about who's opinion you don't like or even that I don't like. Fact checker sites get added to this list too as many of them either fact check in a misleading way or do not present the whole context of the story.
In pihole you simply log onto the admin interface and copy/ paste the direct URL to blockfile.txt into the block lists and click, "Add", there is nothing more to do. The URL is below.
Other software like Adblock Plus or compatible programs might allow you to install custom lists as well and you will have to do the same in these programs in their configuration.
Submit them in the ISSUES section of this site and they will be reviewed and possibly added to the list. Try to link to proof. I have no intent to frequently update the list, and it's mostly to get rid of the most aggregious offenders. However, periodically, I will.