[Arkinsaw]

If they could do this with dogs couldn't they do this with any remote detection scheme. They could use chemical sniffers, X-ray machines the whole shebang!

I don't think they can do X-Ray machines because it requires an intrusion of particles on their part. But they can do heat, light, etc. because heat for example comes out of your body and home on its own and becomes open game. Sort of like garbage on the curb is abandoned property. Your heat signatures are essentially abandoned property.

[NJ_gent]

"I don't think they can do X-Ray machines because it requires an intrusion of particles on their part. But they can do heat, light, etc. because heat for example comes out of your body and home on its own and becomes open game. Sort of like garbage on the curb is abandoned property. Your heat signatures are essentially abandoned property."

See: NSA's TEMPEST. You'd be shocked and amazed what you can tell about what's going on inside a person's home just from the patterns of electromagnetic interference generated.

[Wurlitzer]

"I don't think they can do X-Ray machines because it requires an intrusion of particles on their part."

This could also be applied to magnetic scanning at airports, county buildings, Mt Rushmore (yes they do it there) etc. The magnetic fields pass through your body.