I'm not a moderator, but I think the problem with such threads is that they are too easy. They are too self-referential. Bad title edits happen. I'm sure even bad article killing happens. It is also true that there is no good feedback mechanism for bad title edits. Life isn't perfect, and sometimes you really have to consider the cost/benefit of petty injustices like this.
If it becomes systematic abuse, rather than occasional mistakes, then yes, make a stink. But so far the damage is pretty limited, and HN seems to be working pretty well.
It does sort of point out the need for those who value HN to have some redundancy in their social networking.