I'm not worried about one of my co-workers stealing it, they might take it when I'm on vacation or business trips, but if I label it as my personal property, I doubt even that.
What I am more worried about is the guests that visit our office, and on their way through the building might feel stimulated to take my laptop, cell phone, or - even it it is unlikely - my Topre.
Some of my co-workers use kensington locks on their laptops and screens already, I might want to get some, too.
I should get a white 103 key Realforce, they look so ordinary I doubt someone will take it, though. Maybe later this year.