As long as you have suitable levels of insurance I would be pretty certain that you'ld have no problems with most of the bigger shippers...
I work in the security equipment industry as a systems-engineer (cctv/intruder/access/intercom/barrier etc) - certainly my experience with two majors (one with a predominantly purple colour and another with a preference for an orange shade) is that everything is covered, and I meanif that package moves it is in view of a camera, until loaded onto a container/truck/van, where they know who is responsible for the timed and tracked delivery...
They can (most of the time) cross-reference the bar-coded package with the cctv and track who moved it and when/where... High value (read "insurance-level" here) items are usually kept in a more secure area with much better quality playback of images...
There are still people who think they can fool the system though, which is why this thread emerged... What doesn't surprises me is what appears to be the way the item "went-adrift"... someone would have to know the contents of the package to want to "re-direct" the item... Most "redirection" is an "inside-job"... ie, they know what they are looking for or what is easily "lost"...
Most packages are X-rayed at the main hubs, so it would be obvious that a "Thunderbird" shaped instrument would be of interest for those looking... the difference here is that MC John's item was distinctly rarer than your average (terrible term, but "just" in this case) Gibson and created a "stir" in the environment...
The item just became "too hot to handle" and suddenly got "found"...
Right now, a security manager (I have met one on several ocassions that flys round the whole of the EMEA for the American firm doing just this) is reviewing/has reviewed footage and that there is some driver somewhere sweating, right now, because they (the Company) are concerned by bad advertising...
UPS is a major sponsor of the 2012 London Olympics and anything like this is bad for business... drivers that cannot get signature (and sometimes these signatures are pretty poor from these PDA's they use) are transfered to the crappiest of jobs pretty quickly if there is the slightest suspicion raised against them that is unproven, and
they... are... watched...Most common items that "wander"...? Apple goods... with items that are easily "portable" and similar in nature running a poor second...
Hopefully, all's well that ends well... and a signature and insurance are essential...