So, the term cracker didn't come about because most of them were white?

Hmm, So the neighbor is emitting photons that are being intercepted by you through some means. The law varied depending on the frequency. IIRC, some freqs are illegal to intercept, such as some phones. Other frequencies are illegal to emit, such as x-rays, gamma rays, and visible light especially if it's been reflected off of certain parts of one's anatomy.

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"What you think you thought you saw you did not see." Agent J, MiB - Manhatten Bureau