The good thing is you can spot most of the bad lights as they have problems starting, are dim or vary in intensity, or off when they should be on. Most poles have a number tag on them so you can accurately report them to the city or whoever has charge of them. Old Timers would wack em with a sledge to see what pole was guilty.
I somewhat tracked down RFI last year and called the power company. Power company sends a truck out and the guy gets his radio & confirms my suspicion. He wanders around nearby, gets in his truck, turns on his amateur radio and goes hunting. He finds the source half a block away at a pole. He starts pounding on the pole and confirms the problem is up on top. Calls another truck to come over and they proceed to replace all of the crap on top- circuit breaker, lightning arrester, and a few other things .
RFI did go down after that, but was only one source of many. And this year, there are even more sources.
They replaced our neighborhood mercury vapor lamp with one of the those LED ones. As far as I've been able to determine, there has been no change in the RFI due to that. However, they also did not reduce the charge for us paying that thing ($6.50/bimonthly) even though they claim they're less expensive.
If 47 CFR Part 15 can be ignored, why not also ignore 26 CFR Part 1?