Earlier quoted context omitted.
I hope that ssh'ing into anyone's laptop using your sysadmin credentials in order to play a prank is a fireable offense at your company.
Agree. Though until people never mess up their computers, we'll always need root. All super user interactions should be logged and audited, always. Not just "this was logged..." Which most people know means no one will ever look at it. But if everyone knew that was backed up with a call as to why that interaction happened with no associated case, etc.
I like a good prank. Leave your screen unlocked? You deserve the abuse you get. :) But accessing my laptop in this way is just creepy.