Are we defining "hero" as a person worth respect or worthy of praise? Or are we going to turn this into an ethical debate of good and evil?
As far as I'm concerned, leaving aside trivial concepts of good and evil, I realize that the Shinsen Gumi, or basically most samurai, are the contrary of today's society which basically lacks any values whatsoever or determination. That, in a sense, might be worthy of some respect, though I'm not sure I'd label them "heroes" per se. In fact, the term "hero" seems paradoxical and anachronic in this day and age.