I am of the opinion that Rowling approves of F&G's brand of humor as well... I don't recall any of their non-Slytherin and/or non-"evil" victims express their hurt or anger for being the receiving end of the twins marvelous pranks (except for maybe Ron, but F&G were little back then thus excused). For example while it puzzles me to this day that Neville's pride and sense of self-worth was delt such a blow(I'm not brave enough to be in Gryffindor *sniff*!)by Draco's leg-lock curse, it was completely laugh-out-loud funny that he got turned into a canary in front of everyone (he must've felt the *benign vibe* from the twins~! They knew he'd be *thrilled* to be turned into an animal and not feel humiliated!)- hey it's not for us readers to decide how Neville must logically feel given his earlier reaction to being the unsuspecting victim of a practical joke in public ;););)

Oh and Nor will they ever be 'consciously evil'? What does that even mean ^^;? Like... deliberately cruel...? In that case I'd be pretty surprised if F&G of all people are completely free of a cruelty streak- since don't most people have it?