"Like any hunter, I use my weapons. You must use yours!" - Kraven the Hunter
Firstly, Kraven isn't a superhero ... but a super-villain! However, he does make a good point which is often missed by super-heroes! To set the scene, Kraven is hunting the Black Panther and shoots him with a drug-tipped dart which weakens the Black Panther.
Black Panther complains about the cowardly attack but all that Kraven is doing is using everything at his disposal to take down his prey. How often don't we hold ourselves back because of personal rules we create for ourselves? The Batman often blurs the lines between what is ethically right and wrong when he interrogates his villains but at the end of the day he gets the right results using all the tools at his disposal!
I've been enjoying seeing Black Panther step into the shoes of Daredevil to look after his "turf". These have been interesting reads and would highly recommend the stories to those looking for a "noir/superhero" read.
References: Taken from Black Panther: The man without fear (Fear Itself)(ISBN: 978-0-7851-5810-3) by David Liss (writer), and Jefte Palo and Francesco Francavilla (artists). Published by Marvel Comics.