A good idea..

[beatlefreak]

Paul's right - these microchips have no power source. They need the scanner in close proximity of them to generate an electro-magnetic field, which powers the chip to be read.

[shamustwin]

Yes, the chips in animals and I assume guitars would need a scanner. I've scanned many a dog and cat.

I'm for the technology of "lo-jacks" for people.

Say a marine in Iraq is captured. We'd know where he was being hidden and possibly the bad guy's HQ's.

[johnhall]

These chips have very limited range or more correctly, the scanners do. The type of chips that are affordable for a guitar (or an animal) have a range less than a foot. This outfit Snagg, has offered them for years with quite limited success, mainly because so few places actually have the scanners to read them.