Sure, you could smash one open, but these are pieces of consumer electronics, not Easter eggs. Why do you always have to go for the violent option first?
In a post over on Behance, industrial designer George Schnakenberg explains the design process behind the last Guitar Hero peripheral, that used for Warriors of Rock, and how shifting all of the important stuff into the fret board let them save time, save money, speed up production time and create a "template" core that could be changed each year with a minimum of fuss.
Not that Guitar Hero ever got the chance to do that, but, well, it was a good idea.
Guitar Hero 6 [Behance]