Steve would be an absolute menace (pun intended) with the fake, clunky, plastic lightsabers that start being sold when the Star Wars prequels come out.
He doesn't get one for himself, he steals one of Eddie's or Dustin's and twirls it in his hand before he whacks someone with it. The only people free from his viscous lightsaber attacks are Max and Erica.
Yes, this does devolve into Steve, Eddie, and the Party having giant lightsaber battles in somebody's backyard. Eddie has Darth Maul's double-ended one and smacks himself in the face with it more than he hits anyone else.