But this time, Twitter went a step further , saying it will continue to monitor reports about other accounts potentially associated with Jones or Infowars and will “take action” if it finds any attempts to circumvent the ban.

Jones had about 900,000 followers on Twitter. Infowars had about 430,000.

In a voicemail left with The Associated Press, Jones expressed disbelief that the incident with Darcy could have led to his ban. “He says horrible lies about me and edits things I’ve said,” Jones said. “He’s the one that’s been abusing me.”

Darcy referred questions to a CNN spokeswoman, who offered no comment.

Democratic U.S. Rep. Frank Pallone of New Jersey praised Twitter’s action in a tweet. “Glad Twitter is taking steps to put an end to the abusive behavior from Alex Jones & Infowars,” the tweet stated. “Tweets designed to threaten, belittle, demean and silence individuals have no place on this platform.”

Critics said there was still a lack of transparency about how large services carry out their policies. Media Matters for America, a nonprofit dedicated to criticizing conservative media outlets, said the move was “about time” but also noted the behavior was “par for the course” for Jones.

David Greene, civil liberties director for the Electronic Frontier Foundation, said Jones’ ban is almost a distraction to a real debate he believes people should have about how posts should be moderated on services controlled by just a few giant companies.

“Whether the stuff he posted yesterday really crossed the line, as opposed to other stuff, I don’t know,” Greene said.

The EFF believes that social media companies should disclose the number of enforcement actions and offer clear explanations to people on when and why their posts are removed. The group also believes there should be an appeal process.

Jones heckled Darcy in a Capitol Hill hallway where reporters were waiting to enter the House hearing room at which Dorsey was to appear. Earlier that day, Jones apparently attempted to chase Dorsey out of the building.

On his Facebook page, Jones has posted a video that included some of the exchange with Darcy Thursday afternoon. Posts later in the afternoon acknowledged his ban on Twitter and urged his followers to find him elsewhere online.

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Nakashima reported from San Francisco. Associated Press writer Mary Clare Jalonick contributed to this story from Washington.