The ignore feature was improved - now even the quotes from an ignored user should be hidden. To update the script, try to reload the page from cache (hit F5 or CTRL+F5 button on a discussion page, eg. this page). Update: this change was reverted as it's more useful to read a quote (but without a username attribution).
To make our platform more user-friendly, we've moved the "Ignored Posters" feature to the main page. This change makes it easier for everyone, including those not logged in, to quickly ignore users who engage in personal attacks or use profane language. In addition, we made it work with the Checker.
How about making ignored names public...as in: X ignores Y ... for all to see... The feature solely relies on the local user browser, not on a database. Nobody, except for the user him/herself, knows which usernames are ignored. Still, even if it was possible, this would be an unnecessary feature to develop considering possible time and effort.