'Frothy with scum': Celebrities who said goodbye to social media (pictures) - CNET

"Avengers" director Joss Whedon -- best known for his hit TV series "Buffy the Vampire Slayer" and "Firefly" -- quit Twitter in 2015. "Twitter is an addictive little thing," Whedon told Buzzfeed, "and if it's there, I gotta check it. When you keep doing something after it stops giving you pleasure, that's kind of rock bottom for an addict. I just had a little moment of clarity where I'm like, You know what? If I want to get stuff done, I need to not constantly hit this thing for a news item or a joke or some praise, and then be suddenly sad when there's hate and then hate and then hate."