After his expulsion, he attended Worcester Academy, graduating in 1955.
Hoffman engaged in many behaviors typical of rebellious teenagers in the 1950s, such as riding motorcycles, wearing leather jackets, and sporting a ducktail haircut.
You would have served Hitler better." He later added that "your idea of justice is the only obscenity in the room." Both Davis and Rubin told the Judge "this court is bullshit." When Hoffman was asked in what state he resided, he replied the "state of mind of my brothers and sisters".
Other celebrities were called as "cultural witnesses" including Allen Ginsberg, Phil Ochs, Arlo Guthrie, Norman Mailer and others.
All seven defendants were found not guilty of conspiracy.
At sentencing, Hoffman suggested the judge try LSD and offered to set him up with "a dealer he knew in Florida" (the judge was known to be headed to Florida for a post-trial vacation).
We explained everything to those guys, and they violated everything we taught them.
"At that time we really had no notion of anything called a media event." Yet the press was quick to react and by evening the event was reported around the world.
Judge Hoffman became the favorite courtroom target of the Chicago Seven defendants, who frequently would insult the judge to his face.
Abbie Hoffman told Judge Hoffman "you are a 'shande fur de Goyim' [disgrace in front of the gentiles].
He was among the group that came to be known as the Chicago Seven (originally known as the Chicago Eight), which included fellow Yippie Jerry Rubin, David Dellinger, Rennie Davis, John Froines, Lee Weiner, future California state senator Tom Hayden and Black Panther Party co-founder Bobby Seale (before his trial was severed from the others).
Presided over by Judge Julius Hoffman (no relation to Hoffman, about which he joked throughout the trial), Abbie Hoffman's courtroom antics frequently grabbed the headlines; one day, defendants Hoffman and Rubin appeared in court dressed in judicial robes, while on another day, Hoffman was sworn in as a witness with his hand giving the finger.