Best use of ‘groovy’ in popular culture: Groovy.
Really, the evidence that MacDonald is guilty is overwhelming. People can always find evidence to “prove” what they want to believe–hence the “Paul McCartney is dead” theory back in the day, and the MacDonald supporters who insist the guy is innocent. (Yeah, I remember I said in my first post I didn’t want to go there, but the door was open.)
It’s interesting, though, that there were some students still using “groovy” in the early 70’s. First time I’ve ever known of anyone doing so that late. Were they still listening to Herman’s Hermits, too?
I have trouble with the argument that if you haven’t tried LSD, you can’t say that it wouldn’t make you say things like “groovy.” Acid has certain known effects, including visual and auditory hallucinations. I don’t know of any drug, LSD notwithstanding, that causes people to use outdated expressions. I’m picturing a newspaper article: "The officer suspected Smith was under the influence of LSD when he called the officer “Daddy-o,” accused him of being a “square,” and proclaimed, “LSD is the ginchiest!”
I haven’t done it myself either, but I believe heroin’s effects go far beyond feeling “mellow.” (Someone who lived on my dorm corridor when I was an undergraduate was into smack, and he certainly didn’t present an appearance of being mellow.)