All the nation's toilets also flush repeatedly at much the same time, which was a central plot point in the film "Flushed Away".
It's an interesting phenomenon, though I'd never considered that dealing with it could prepare us for a malicious attack some day.
E.g. in football/"soccer" the half time break isn't at a predetermined point in time, as the start of the game can be delayed and the referee can and usually does give some extra time to make up for unplanned breaks due to fouls etc. Same after regular time in the second half. And if it's a knockout game, then you may even have real overtime and even a penalty shootout to find a winner. Then you have unplanned/semi-planned breaks like players getting a break to drink when it's hot, or... heavy rain or... the ref getting hit in the head with a bottle. And people will use these breaks to do their "business" and make tea/coffee/use the microwave oven. And after the game, players may stay on the field to celebrate or cry about the loss, which I would guess a computervision "AI" would have trouble distinguishing from the actual game.
Just having some people watch the game in the control room (which they probably would do or at least want to do anyway) is still easier and more reliable than trying to train an AI to detect all that, in my humble opinion :D
Of course, automation like automatically detecting and scaling the grid by looking at the grid itself would and does help a lot; but that's different from automating watching the telly.
I know it does (did?) on Twitch, last time I looked.
[1] for the yanks, this show gave us: https://www.youtube.com/watch?v=3FsVeMz1F5c&t=60
(In a 1975 movie, Zhenya Lukashin offers to repay Nadya Shevelova for making a long distance call from her apartment, so I gather that, as in the west, non-local rates weren't trivial.)
Edit: https://rus.azattyq.org/a/intervidenie-konkurent-evrovidenia...
> "В социалистических странах, где установки телефона надо было ждать годами или давать для ускорения взятку, зрители прибегали к интересной сигнализации о своих предпочтениях. Они включали свет, если песня понравилась, и выключали его, если не нравилась. Итоги присуждения баллов участникам подводились на основании данных об изменении нагрузки в электрической сети."
But note that from the logo, this appears to be a "Radio Liberty", i.e. US propaganda, article.
Edit1,5: same story from RT.
https://russian.rt.com/inotv/2014-08-04/Na-Intervidenii-ne-b...
> "Из-за того, что телефонные сети не были достаточно развиты, чтобы обеспечить голосование, зрителей просили голосовать с помощью электричества. Включенный свет – за понравившиеся номера, выключенный – за непонравившиеся; затем отмечали показатели электрических сетей."
Still no primary source, but if russian and US state owned media agree, and absent any personal recollections, I'm inclined to accept the story. (Unless our alien lizard overlords are behind the whole thing?)
Edit2: interesting, according to a documentary referred to in the google cache of http://www.alla-superstar.ru/component/alla/songs/song/91.ht... it took RUB 25 and a bottle of vodka to get Все Могут Короли past the censors in the mid-70s. (roughly between 1 and 2 benjamins in 2020 USD? From this point of view BTC makes a poor substitute currency, as one can't toast with it...)
The theme doesn't seem to be very different from other pop music, such as https://www.youtube.com/watch?v=Pw-9qu4gcWI .
A mid-80's western report on the "vodka economy" suggests that in this case the bottle itself was meant more as a traditional component of a bribe/tip, and probably didn't contribute much to the pecuniary value. (Indeed, one suggestion in the paper is that, just as the dollar lost its gold standard, during the seventies the ruble also lost its vodka standard of 3 RUB = 1 L.)
https://www.ucis.pitt.edu/nceeer/1985-Berk-Duke-Treml.pdf
> "30. Krokodil [No. 14, 1970, 5] carried a cartoon showing a living room where every inch of space -- floor, window sills, furniture -- was filled with vodka bottles . The woman pictured amid these hundreds of bottles explained her predicament : "My husband is an excellent plumber, but he does not drink ...."
> "38. Increases in vodka prices are important in yet another respect. Interest rates on savings accounts in the USSR are, on the average, about 2.5% per annum, and increases in vodka prices since the late 1950s have more than compensated the consumer who has kept his wealth in vodka rather than in savings accounts."