Well, people sit in my chair upon occasion, but my workstation is my own, so the odds of anyone besides me spilling are few. If you have white/beige/grey keyboards, your keyboard at work is probably safer, than if it is black with attractive lines.
I figure my Realforce will have the following going for it not being stolen:
As stated, the laptops and LCDs are more attractive steals.
Most people who've just pressed the key on a mechanical, without typing, just don't get it.
Topres, like browns will probably still be too subtle a difference for them to get it.
The stealth legend look may be popular on geekhack, but most people take a glance at what are or what appear to be blank keys and comment "OMG, how do you type on that?"
Even if I've explained my keyboard to my coworkers and they've indexed poked at it like some kind seaweed that washed up on the beach, they still don't think there's much difference. I'll just leave them to their Dell drudgery.
Honestly, one of the reasons I want the Topre, which I get some time today ^_^, rather my browns in the office, is because the Topre will be quieter (my obsessions, not my coworkers) and better survive a spill.