Oh, definitely. Especially when all they got was the glossed-over version of events from the Headmaster. You know how stories get changed as they're passed around.

Let's see, from the Slytherin table, here's what I see: three Gryffindorks sneak out at night (breaking rules), break into an area that's forbidden (more rule breaking), bring down barriers set by teachers to protect something (akin to hacking), then Harry steals what was hidden. Suuuuure - that's worth extra house points, and the school's admiration! Oh, and they hit Neville with a curse en route out, so HE gets points for being stupid.

That's fair!