The ignore feature is not something we developed, but a standard feature on Xenforo (the forum software we use/customize). On the main site, it's something we just recently added as a bridge to the comments from the forum's functionality.
Now, taking your question more literally... I guess it depends . I personally have grown accustomed to ignore comments I read online all the time. It gets harder with more foolish comments/commenters, but most of the time I get by.