Forum:Sparkhood and evil

It seems to be the conventional wisdom in this world that sparks are always evil. Certainly Othar thinks so, and certainly the pre-Boys Heterodynes are unambiguously shown as evil.

But almost all of the young generation -- Agatha, Gil, Tarvek (I know he's controversial, but I believe in him), all of the gang at school in Castle Wulfenbach, all the gang in the circus -- are good. Not Tweedle, I suppose. And also, not the original Storm King and his crowd, back in the day.

So, why the conventional wisdom? Why don't people think, "Sparks can be good or evil, like the rest of us, but the evil ones really do a lot of damage"?

I guess one possibility is that sparks are decent in their youth but, over time, maybe because of a tendency to paranoia, become evil. So maybe 20 years from now Agatha will be evil, too.

But I'd like to think that the character and personality of sparks is being influenced somehow. Either that they were evil by nature, but someone (Klaus?  The Dreen?) is changing their genome to be good, or that they're, if not good by nature then at least spread out over a range of characters, like the rest of us, but someone (maybe the Other is older than we think?) has been pushing them toward evil, and after the Other was driven out for a while the sparks are returning to normal.