You don't even know the half of it. Bloodbending is a dark art and is outlawed. Tarrlok used bloodbending to hold me down so he could kidnap me and locked me up in a cabin so I couldn't tell anyone he was a bloodbender, just to keep his seat on the council.

Amon is a revolutionist radical who used his Equalist army to try to overthrow the order between bender and non-benders established by the Avatar before me; Aang. With his bloodbending, he could take away a person's bending permanently and he was lying to all of his followers since he was a waterbender himself.

[Taking a deep breath, Korra grabs her cup and sips from the straw.] Tarrlok did give me the information that Amon was a bender, which was key in me taking down Amon. [She left that where it was, a subject she didn't really know how to feel about yet.]

Sorry, I didn't mean to just bludgeon you with my past problems. To answer your question: Yeah, they're bad people.