I don't really get the whole "baddest" fish idea. Some fish are very agressive... this isn't bad, but just part of their nature. Some fishkeepers may put them in bad situations where a fish is going to get injured or killed... this is more about who is the "baddest" (worst) fish keeper, not about the fish.
To the OP... not dissing you, it's just that the thread title made me laugh.