I contacted them. They outright refused to delete any comments, all comments or my entire account. Hacker News by matter of policy WILL NOT delete your comments, even when requested in writing.
in your case there seem likely to be extenuating circumstances; just after posting the above you accused me of 'anti-semitic rhetoric' in https://news.ycombinator.com/item?id=37150457 for example
people who egregiously abuse the site like that may be less likely to get cooperation in concealing their abuses
Interesting how you equate a simple desire to have the ability to delete comments (ostensibly a site-supported function) with "concealing abuses" -- it says more about your own projection than anything else.
All you've done above is make baseless assumptions and imply accusations against kitanata with no basis or merit.
Might want to check your own actions out before you go accusing others of "egregious abuse" - and as you put it, dial back on the rhetoric ;)
judging from the number of your comments that have been killed today you may be on the way to being banned yourself
maybe you should consider more carefully the moral of the hasidic parable i quoted in my previous comment https://news.ycombinator.com/item?id=37145942, that nothing you say can be unsaid