Warning: The video above contains some language which may offend
The Internet has become a forum where citizens of the world can hide behind their keyboards and say anything to anyone with very little consequence. With the ever-expanding scope of social media, getting directly in touch with anyone isn't that difficult - celebrities included.
Comedian Jimmy Kimmel turns the tables on online bullies by collating nasty tweets and getting the victims to read out the mean comments about themselves.
In the ninth instalment of the gag, Sean Penn, Liv Tyler, Elizabeth Banks, Daniel Radcliffe, Colin Farrell and Kurt Russell are just some of the big names to join in on the joke.
This may just serve as a reminder you’re never as anonymous as you may think.
Watch the video.