[LordKano]

Where WiFi jamming is technically also legal if it does not affect any external party.

I'll concede the possibility that my understanding is incorrect but jamming is flat out illegal(for non-government entities). It's illegal to even sell jamming devices. I remember a few years ago, the FCC started threatening movie theaters that had been jamming cell phones.

[DrStalker]

What is the legal definition of a jamming device? The wifi jamming being discussed does not interfere with any existing radio communications, it adds extra packets of data that the client device interprets. The original signal is fine, it's just not usable in a practical sense.

Broadcasting white noise on wifi frequencies to drown out communications is the sort of jamming that is clearly illegal, this likely isn't jamming under current laws.

[Fjolsvith]

There was also a guy in Florida who went to jail because he ran a jammer in his car during his work commute so people wouldn't text and drive around him.

[wahsd]

I am not 100% sure, but I think if you are jamming signals on your own, personal, private property and the jamming does not extend past your boundaries, it might be legal. But that is an edge case that really doesn't apply in the vast majority of situations. The rule of thumb would essentially be that if you are jamming someone's signal outside of the strict boundaries of your personal, private property you are doing so illegally.