We have our own big campus, not generally accessed by the public. We have bike racks. Some bikers with expensive road bikes complain that they can't bring their bikes in, but we don't have any security issues. The bikes that are there never get tampered with, even with quick-release hardware.

Consider a folding bike. Once you put it into the bag, it is considered luggage, not a bicycle. With my folder, I can put it under the desk in my cube. Yeah, it is a compromise. It is not as efficient or comfy as a big stiffy, though.

Another option is to get a ghetto commuter that isn't worth messing with.

Random thought: Do people steal Brooks saddles with butt sweat all soaked into them? If I were a thief, I'd stay away from those, even if they are costly.