Good times.

Usually your first instinct is to change their sexual orientation and blast out a few silly posts. If you really want to get them go into their images and save a bunch of their pictures. Then bring them into Photoshop and subtly change their facial expressions and add bizarre things in the background. After that, re-upload their images and turn off the status update showing that new images have been uploaded. Then, sit back and enjoy the slow but hilarious situation that ensues. Click here for a classic example icon smile

That moment when your friend forgot to log off on Facebook