Pegg, 46, who decided to quit the social media platform after he reached five million followers, said he doesn't miss the "mean" remarks some of his so-called fans would post online, reported Guradian online.
"I felt I'd given the world my phone number. I'd read the replies and it was people talking to you as if they knew you. Twitter is a narcissist's help centre.
"People generate their own celebrity on it and then they buy into it. They drink the Kool-Aid of their follower numbers. Lots and lots of people would be lovely and it would give you this little buzz of validation."