It's a fine legal point, but that statement isn't entirely true.
A full spectrum device always interferes, so is illegal.
Also so easy to build, impossible to ban.
Narrow band interference can be harmless or so innocuous as to be nearly so, and is treated so.
But this could be a fifty page discussion of the fcc agenda and failure to do it's job as designed.
They now only represent money interest, and I have advocated for their complete dissolution, and replacement.
It's more about use and intent, as with many tools.
And if they're smart, they would rather see narrow use devices out there.
They continue to shut down well operated "pirate" stations on interference grounds, when it is a lie.
They also refuse to legally license such stations, as they are mandated to do.
In my neighborhood, my equipment was legal, but the use was not, other than a necessity due to fcc inaction after many complaints.
I interfered with no one else, but the totally illegal transmitter.
In fact, the fcc didn't care about his wildly illegal and disruptive (daily) operation because the complaints didn't come from a moneyed tv or radio station.
A key phrase is "devices designed
to intentionally block, jam, or interfere with authorized radio communications".
Many buildings already block signals and have to use repeaters to enable mobile radio (phone) use.
A concern is interference outside of an intended "jammed" area, typically a cinema or restaurant.
If they don't permit or allow quality equipment, there will be worse problems from uncontrolled, unintended interference.
'Interference' is the fcc buzzword to allow them to do what they want, and this is why "jammers" are a sensitive area in this country.
A low power device, such as mentioned, may have a range of ten or twenty feet and is a lower priority than higher power units.
Typical anti-surveillance jammers operate in this low range, subtlety being an asset.
Conventional wisdom is that it is better to find devices without making it obvious that this has been done.
Effective counter-surveillance can be involved.
So there is a demand and as long as the jammers are legal in some places, they will be on the market.
The fcc also routinely ignores or allows federal law to be violated, as with legal receivers suppressed for other reasons.
In theory this is an interference device, but not radio, and intermittent use only, so "legal" last I heard.
What do you think?
it was originally only a universal off switch.