Palillo died two years ago.
FOR THE RECORD: Even we got a little confused; a previous version of this post incorrectly said Palillo died Aug. 15, 2012. He died Aug. 14, 2012.
The whole phenomenon seemed pretty confusing; perhaps someone got confused because the actor did die suddenly on Aug. 14, but in 2012.
Some tweets claiming the news just happened had news articles attached. The articles had correct 2012 dates.
Here are some examples of people upset about the news:
"OH NO!!!! Horshack too?????? Ooh Ooh Oooh!! Mr. Kotter!," tweeted Eddie Napolillo.
"RIP Ron Palillo, aka Horshack, dead of a heart attack eary this morning at age 63. A classic TV character, that laugh will live forever," tweeted Gary Collard.
Even CNN anchor Jake Tapper seemed to believe Palillo had died, tweeting "RIP Horshack" with a link to an old story.
Tapper has since deleted the tweet and corrected himself.
"For the record Palillo died in 2012. I was just alerted to it this evening by @evanasmith," Tapper tweeted.