In this case, as reported by Big Journalism, HuffPost decided to punish one of its co-founders (and bloggers) Andrew Breitbart for daring to call self-professed communist (and fellow HuffPost blogger) Van Jones a “commie punk” and “a cop killer-supporting, racist, demagogic freak,” in an article at the Daily Caller. It should be noted that he said all that after Van Jones organized a petition drive against Breitbart even being allowed to post on HuffPost, in which he attacked Brietbart with a toilet-full of… ad hominem attacks.

HuffPost’s VP-Media Relations, Mario Ruiz, had nothing to say about Van Jones’ attack on Breitbart.
Regarding Breitbart’s response, however, Ruiz laid down HuffPost’s supposed “law”:
The Huffington Post is committed to fostering a lively and often provocative debate about the issues of the day and encourages a wide range of voices from all perspectives to participate. Andrew Brietbart’s ad hominem attack on Van Jones in The Daily Caller [...] violates the tenets of debate and civil discourse we have strived for since the day we launched. As a result, we will no longer feature his posts on the front page.
He is welcome to continue publishing his work on HuffPost provided it adheres to our editorial guidelines, as the two posts he published on HuffPost did — guidelines that include a strict prohibition on ad hominem attacks…
Wow, that’s some “standard” that Ruiz described. As you’re about to see, however, the facts demonstrate that Ruiz’s claims are 100% bullshit from top to bottom, inside out, back to front. (more…)