Shaggy went to Hampshire College, Fred went to Amherst, Daphne went to Mount Holyoke, Velma to Smith and Scooby to UMASS.
(It's not really true but they do fit the characteristics of each school.)
They were in high school and they make several references to it.
They were obviously stoners and high school drop outs.
How come it was always dark and foggy wherever they went?
People all say that Velma was a lesbian. I don't buy it. I bet she was letting Freddie and Shaggy DP her every chance she could get.
It was a "high" school in either case.
I always thought Daphne & Shaggy were fucking. If you followed the cartoon, Fred & Velma eventually disappear and it is just Daphne, Shaggy, Scooby and Scrappy.
Fred was one sick kinky fuck. Always trying to trap these monsters to have his way with them only to be cock blocked by Velma unmasking them and then handing them over to the police. God, he must have hated her with the heat of a thousand suns.
I babysat my neighbor's son and saw the new Scooby Doo on the Cartoon Network a couple of weeks ago. I was trying to figure this out myself. They looked like adults and had pretty adult-sounding conversations and the classrooms could pass for college classrooms. It wasn't until they went out in the hallway to their lockers that you picked up in was H.S. I couldn't remember from the original since the last episode I saw was mid to late '70s. Were they in college back then? It seemed like it. Probably because I was so young.
Scooby Snacks are now known as "edibles."
I always thought they were teenage runaways, who drove around robbing gas stations for drug money.
My theory would certainly why they never went to school or saw their families, and why they had so many hallucinations.
In the porn parody linked at r1, why wasn't Daphne a redhead?
In the original cartoon from the 70s I don't remember them ever being in school, they seemed to just lead this nomadic existence where they drove in their psychedelic van from one haunted mystery to the other.
They had escaped from True Direction
In the new series Fred and Daphne are a couple and Velma and Shaggy are a couple.