The prospect of completely removing a persons ability to comment on my posts worries me from an open discourse perspective (right now). As the site scales I'm sure my opinion will change, but right now I like just pushing their comments to the bottom / not getting notifications and all that. That's enough customization for me at this point.
Both you and kleinbl00 are approaching this from an open discourse perspective. But people with opinions are not who I ignore (some do on this site, that's fine). I ignore people whose comments are consistently stupid or whose posts are consistently spam or from bad sources. It's not a question of creating an echo chamber or getting rid of viewpoints with which I disagree; it's a question of having worthless content getting in the way of viewing good content. Also there seem to be some issues specific to me regarding notifications. Not sure how to sort that out.
Ah, yes I ignore the people who spam too (I do wish they wouldn't show up on the community page, less publicity the better but that's a different story). Part of it is that my feed page and the global page are scarily similar (like, nearly identical) so I don't notice most of them anyway.