That's really why I quit riding.... I rode steadily up to 1974, and went on a hiatus until 1982, and I saw a big jump in careless drivers between those times. It may just be due to the much greater numbers of cars on the roads, but it really did seem like every other car was driven by a homicidal maniac with my name on his mind...
IMHO, nowadays in and around Detroit, two out of every three cars, trucks, and motorcycles are being driven by homicidal maniacs with "To Whom It May Concern" or "Occupant" on their minds...