Going old school, but...
Does anyone else want to literally reach over and strangle people who move your desk items, including swinging your monitor around, using your pen and paper, moving your fan or bottles, or other things?

I usually grumble to myself just loudly enough that those moving my stuff can feel the rage violently trembling within me while I put things back where they belong.

When I'm done I smile big and wide at that person.

That usually freaks them out enough to grab things off someone else's desk or at least put things back the way they found them.

Sometimes though it's my cat and I just put that mother fucker with a little more aggressive love.

The best are the ones who take a seat next to you, start talking to you and suddenly you find them sucking your pen in their mouth

Oy! That’s just nasty!!!