I'm starting a security company that will protect those of the Lowest Common Denominator against alien buggery. It's simply a camera with infrared led's, which can be hooked to a time lapse VCR or hard drive recorder, etc.
No self respecting alien bung diver, able to cross the interstellar expanse yet too frickin' stupid to find it's way to San Fransicko, will be caught coming through your bedroom walls via this camera.