Characters
He deserves a torturous and slow death by spider bites. Well, for today, we'll just have to throw spitballs at his neck in class.
— Willow · Buffy the Vampire Slayer

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker says the target deserves a slow, agonizing death from spider bites. Since that is not on offer, they settle for a petty schoolroom revenge: spitballs thrown at his neck during class. The comic downgrade turns lethal fantasy into small-scale spite.
Context reviewed