...to blacklist Breitbart News in order to placate left-wing totalitarians is a disgraceful act of cowardice.
UPDATE 8:50 a.m. EST 12/7:
Visitors to Breitbart now face a pop-up ad asking them to sign a petition to "Dump Kellogg's" and "join the movement against Kellogg's bigotry."
That petition now has more than 390,000 signatures, according to a Breitbart story.
ORIGINAL STORY: Kellogg, the maker of Pop-Tarts, Eggo waffles and a number of popular breakfast cereals, announced on Tuesday it was pulling all of its ads from Breitbart, the alt-right news site run by Donald Trump adviser Steve Bannon.
Members of the alt-right espouse an ideology that's a mix of racism, white nationalism and populism. Bannon has called Breitbart "the platform of the alt-right."
We regularly work with our media buying partners to ensure our ads do not appear on sites that aren't aligned with our values as a company.
Kellogg spokesman Kris Charles said its ads only appeared on Breitbart "inadvertently."
"We learned from consumers that ads were placed on Breitbart.com and decided to discontinue advertising there," Charles said.
This was brought to our attention this morning. We plan to block our ads from appearing on Breitbart News Network.— Warby Parker (@WarbyParker) November 21, 2016
Other companies have pulled ads from the site, like eyeglass company Warby Parker.
USA Today reports AppNexus, a leading online advertising network, has also blocked Breitbart, as well as pharmaceutical manufacturer Novo Nordisk and the San Diego Zoo.
Kellogg did not specify how exactly Breitbart contradicted its values.
Kellog's fans on Twitter praised the move.
Some called the move "proof that boycotts work."
But some Breitbart supporters said they wouldn't buy the cereal again.
And Trump supporters vowed revenge.