This is a simple Greasemonkey script which unhides the checkbox which allows you to hide questions with ignored tags. It allows you to quickly toggle this setting at your leisure without having to navigate to the settings page. Apparently it has been sitting there the whole time only it was hidden.
Ideas found in this meta thread serve as inspiration.
Written for and tested on Firefox 4.0 on Windows 7. I will be trying to maintain compatibility with Chrome in future releases. Specifically on Chrome 11.0 on Windows XP. Hopefully combinations of either browser and OS will still work.
This will be part of a larger project which is a collection of scripts to enhance Stack Exchange if and when I figure out how to do it.