" Hufflepuffs are boring "

*wawes Nymphadora Tonks in your general direction*

"Hufflepuffs are stupid pushovers*

*drops Cedric Diggory's dead body on top of you*

"Hufflepuffs are shy"

*slaps you in the face with Ernie MacMillan*

"Hufflepuffs are polite"

*fires Zacharias Smith at you out of a canon*