I hate to admit this in most any company, but especially in the company of law-abiding and respectable radio operators..... but, way back in about 1972+/- I was talked into getting into the ranks of some local CB'rs in the small, country town where we were living. A small and sometimes a little backwards town with a whole bunch of idiots and outlaws. Well, we all knew the rules and back then even though CB required a license, it was simple to get and required little to no studying. I don't even remember for sure if there was any kind of test. I think you just filled out a form and sent it in with your money to get it and your call sign.
OK, now it gets bad. You were supposed to always use your 'call sign' when getting on or off the air, ask for a break to start a conversation (that's what truckers are doing when you hear them say "breaker 19") or to search for someone in particular and you NEVER, EVER was supposed to use a linear amplifier. You see CB radios were limited to 5 watts IIRC, but that really limited their potential distance (PS: that's exactly what the intent was). CB was designed as a short distance, typically family and friend communications. And it's the one ALL the truckers were using at the time.
So, to get out over the truckers, who may or may not have been using linear amps, the home boys (some of them ... certainly not me) would also use these amps. They would also sometimes convert big dog radios like "Siltronics 1011 D's" (that's a sideband transmitter) to 11 meters (CB frequency), add on an big dog linear amp, some as big as 500 watts.. (but certainly not me) and would abuse the airways and other honest and respectable CB'rs with their big 4 element beam antennas (like the "Moon Raker") and talk pretty much when and where they wanted. Even with a "Star Duster" ground plane antenna and a "D104" mike those guys (certainly not me) could get out.... way, way out with those 500 amps.
The really bad thing, other than being way, way illegal on their equipment (but certainly not me) was that out in the country where they lived the power grid was a little on the shaky side and when they (certainly not me) would power up that "1011 D" and that 500 watt amp, it was told that all the lights in the neighbor hood would go dim while he transmitted.
Now I'm not sure it was quite that bad, but I wouldn't have put it past some of those yahoos (certainly not me) to do something like that. That was about 50 years or so ago and I'm sure that most of them (certainly not me) have better sense now than back then and are living a much more respectable and law-abiding lifestyle. In fact, I'll say with all sincerity that the one I knew the best and was certainly closest to, learned very early on and was quite sorry for his short time of radio lawlessness.