"We understand from news reports that you may be blocking some Twitter users from your @AOC account because of the views they have expressed," the Knight First Amendment Institute at Columbia University tells the lawmaker. "This practice is unconstitutional, and we are writing in the hope of dissuading you from engaging in it."

Google says publishers lose significant revenue when users block cookies, but an earlier study by academics contradicts the company's findings.

"Companies across every industry are battling website-accessibility lawsuits, with no consistent message from the courts on whether or how to comply," Domino's writes.

Unroll.Me parent company Slice Technologies sells "anonymized" information about people's emails -- including their receipts for online purchases.

The decision marks the third time a federal appellate court has ruled social media platforms aren't responsible for attacks by terrorists.