For sure. Although i think most people with enough radio knowledge to even go down this path also know how trivial it is to track down the source of interference, even for an amateur with cost-next-to-nothing gear.
I read that to be “They only started looking for it once it started pissing people off”.
Just because the knowledge is there and there's a paper trail doesn't mean anyone will _actually_ put the pieces together
https://nzhistory.govt.nz/page/radio-hauraki-rules-waves%3A-...
Radio Caroline are still around though, they've actually done pretty well recently with fundraisers. Their old pirate ship is still used for broadcasting but these days instead of using the old valve transmitters aboard they use 4G to relay their signal to (ironically enough) an old BBC World Service site which is then broadcast on 648 kHz with a much more modern unit. They've just been licensed to turn up the power considerably too so they'll be receivable in much more of the UK and northern Europe than they are currently soon.
It's kind of interesting to see new AM stations popping up in what's otherwise a dying band. I've always thought it's a bit short-sighted to get rid of AM because in a real national "shit hits the fan" scenario where power and networking are heavily affected it's an efficient way to reach lots of people. You can even build an AM demodulator out of a razor blade and a pencil if you're in proper trouble! I expect by the end of the decade the only things left on AM will be enthusiasts like Radio Caroline and hobbyist pirates (there's quite a few of these in the Netherlands and Greece).
https://www.metacritic.com/movie/pirate-radio
Great soundtrack BTW.
I think this is the story: https://www.cnet.com/tech/computing/man-put-cell-phone-jamme...