People don't look down kicks.
Only time people are critical of it is when the fight is pretty much over which is fair enough. You can't expect civilised people to agree with punting a defeated opponent in the head.
shyt I came moments from stomping a Eurocacs head in when I did club security because he spit on me. If I hadn't stoped and thought about repercussions after I got him to the ground all I instinctively wanted to do was stomp on his head, and frankly if it was an alley I'd got him in as opposed to a busy street corner I would have given him brain damage if not killed him.
I know I'm not built to own a gun because if someone pisses me off the right way I'll throw it all away to remove them from this earth