Peter wasn't sure what he thought about Hogwarts students being Death Eaters, but it was certain that many of the Slytherins were... unsavoury to some degree. He wasn't opposed to at least shaking them up a bit.

"Who do the Slytherins, as a whole, hate the most at this school? The Gryffindors. Who, in turn, despise them."

"Brilliant, Haddock." Peter said. He suddenly realized that he'd spoken aloud. Everyone was looking at him. He had an idea though, so he took a deep breath and kept talking, looking at the fire so he wouldn't have to make direct eye contact with anyone and get too nervous. 

"Well, maybe if we can do something to push the Slytherins or Gryffindors over the edge.... Ok, what if we could figure out a way to prank one of the houses and leave evidence that it was the other?" Peter paused and looked around at his fellow Ravenclaws. 

"I'm not sure which house we should prank, but surely we could figure something out. And once they got started, we wouldn't have to stoke the fire much. Then we could sleuth around and check out possible Death Eaters during the chaos. Any thoughts?"