Good one! Love to see what Dobby comes up with for Snape.
Author's response
Not so much Dobby as Peeves. After all, he represents the entirety of the past and present student body's mischievous and underhanded natures. I'm certain that in the past fifteen years, he's developed a grudge against Snape.
After all: "If you need something done, go to someone with experience."
Alorkin