[SimbaOnSteroids]

A publisher is anyone who distributes information and brands it under their label. AT&T is not this, AT&T is more akin to the power company. If you're a neon sign maker no one can force you to make a sign that says"Irish Need Not Apply". However if you have a sign that says the above the power company can't turn off your power for it. If you put a tag on the sign that says power by acme power company, then they can shut you off.

This is because by posting on facebook or appearing on google you are implicitly now a representative of them because they're branding is all over that homepage. If you say something that facebook really disagrees with and would rather not say they have every right to not say it.

It's why Cloudflare didn't drop the Daily Stormer until after DS started to try and say the CF was on board with their views.