Tape on the bottom of the mouse is another common joke these days.
If the OS you are using has a taskbar, also set it to auto-hide, preferably in a random location.
As always, that kind of elaborate joke is best kept short. I also like replacing someone's shell with `wine cmd`, but nowadays the best protection for myself is that nobody seems to be able to use my computer (sway, full of shortcuts that you have to know in order to do anything). I'm similarly dumbfounded when at my friend's computers. Luckily, this is all fixed by opening a good old POSIX-compliant shell :)
If the OS you are using has a taskbar, also set it to auto-hide, preferably in a random location.
As always, that kind of elaborate joke is best kept short. I also like replacing someone's shell with `wine cmd`, but nowadays the best protection for myself is that nobody seems to be able to use my computer (sway, full of shortcuts that you have to know in order to do anything). I'm similarly dumbfounded when at my friend's computers. Luckily, this is all fixed by opening a good old POSIX-compliant shell :)