I trust those close to me. I extend limited trust to those that have earned it, ie; long-time MW members, reputable online retailers, etc. But leaving something that valuable/critical out unattended is foolhardy. This is far from rape, so that comparison is rather ridiculous. It's more like leaving the keys in your unlocked, running vehicle while you go shopping. Take stupid risks and these things happen. Plus... it's JUST a toy/model/whatever you want to call it. They should be glad it wasn't something that actually meant anything. Get mad about it all you want, but I doubt theives give a damn. This is the real world, not an idealistic fantasy land.
Still.. whoever took it has some stones for a SW nerd.