While the idea of Skinner setting Bart up to misbehave is a funny one, I've got to ask something about Scotchtoberfest.
How can Bart misbehaving at an event off-campus on a Sunday be grounds for detention? You might as well give the kid detention for jumping over other kids with his skateboard back in Season 2.
Also, and this is one of the many reasons early Simpsons impresses me so thoroughly, check out the crowd for Scotchtoberfest.
The crowd has been given tams, capes, and bottles of whiskey. Now that's some excellent work, both by Skinner setting up the sting, and by the animators including little details to give the scene verisimilitude.