It's interesting how characters on soap operas often start out as villians and then, over time, become good guys - like Burke did, and Barnabas will.
Well, as we've mentioned before, it's pretty hard to consider that Barnabas ever became a "good guy" in the truest sense of the term. He did do occasional good things whenever it fit in with his agenda. But good guys tend to not act as vigilantes who dole out "justice" on their own - they allow the suitable authorities to handle it.
And they definitely don't go around killing people simply to protect their own deep, dark, secrets...
And say what one will about Burke's tactics when he first appeared on DS - but he never approached anywhere near the scale of villainy that Barn did. In comparison to Barn, Burke could almost be considered a straight arrow throughout!