Rian Johnson has made a move that has come as a source of surprise and concern for many as he decided to mass-delete tens of thousands of his old tweets.

The move makes a lot of sense in the wake of numerous celebrities being fired over comments they made on the social media platform.

Roseanne Barr was fired by ABC for racist remarks she made on Twitter, and Disney fired James Gunn from Guardians of the Galaxy Vol. 3 after old posts of his containing jokes about pedophilia and rape were circulated by right-wing firebrand Mike Cernovich. Gunn has received much support from his family and colleagues in the aftermath, and there was even a petition for him to be rehired. Barr said she was disgusted by the support he received.

Dan Harmon, meanwhile, also recently left Twitter altogether after 4chan users dug up an old video in which he made child-rape jokes.

Johnson has defended his decision and said there is nothing sinister behind the mass deletion. He tweeted: “No official directive at all, and I don’t think I’ve ever tweeted anything that bad. But it’s nine years of stuff written largely off the cuff as ephemera, if trolls scrutinizing it for ammunition is the new normal, this seems like a “why not?” move.”

It’s a fair point, but probably isn’t completely foolproof. After all, is anything ever completely deleted from the internet?