Ok, so here's the issue with said category: it doesn't really bring any new elements to the table in terms of what you see in a speedrun already. All the enemies that we intentionally take damage from are very easily avoided without major path changes. As I and several others in the community see it, it's just another arbitrary category that clutters the leaderboard.
Besides, there's already plenty of categories where community members are besting each other all the time at. Over the last 2.5 months, the WR for each of the four main categories has changed, sometimes several times; there's 151 individual level records to go for, many of which are empty; the KC wiki also has a highscore leaderboard, if you're still really interested in that damageless aspect you can go for a lot of no hit bonuses. http://kidchameleon.wikia.com/wiki/Score
