@ Dinga: I knew that a lot of US citizens are politically fairly uneducated. That is also the case in other countries, see for instance the various right-wing populist parties in Europe. Somebody votes for them, although it is obvious that they are not worth the ink on the ballot paper. That you say it is 80 - 90 % is a little disturbing. I wouldn't have thought it was so high.
@ Jay: I still reckon compulsory voting is a good thing. At least everyone has to tick something. Even if it means there are people writing silly poems on the ballot paper, and people just voting for the same party they have always voted for, and their father, and his father.
I reckon if voting was compulsory here, then the AfD wouldn't have the success they are currently having. Not all of it, but I reckon about a third of their votes is due to "protest votes". If everyone had to go and vote, even if they just go on voting the same as ever, then the protest votes wouldn'r be as relevant.
For those who don't know: the Alternative for Deutschland is the right-wing populist party in Germany that has no viable political programme, but does have, in my opinion, a rather unfortunate logo...😀