Classmates? More like FUCKING PARASITES!

I work in a group on for on the notes using google docs, for realtime collaboration. WE spend lots of hours in school making them something. Then share it with one good friend and BANG the whole class has them, even though he was not supposed to share it. AND DO YOU EXPECT ONE OF THEM EVEN THANKED US FOR THE WORK WE PUT IN THERE MAKING THESE? The most I heard were fucking complaints. I should let the sniff a razerblade for each complaint and hope they improve their brain capabilities to the level of 0.