A plugin for Question2Answer that displays warnings/hints for users asking questions with certain keywords.
Download and extract the files to your plugins folder (e.g. qa-plugins/ask-notices).
In the Admin > Plugin options, fill in the trigger keywords and notice. For example, best,worst would trigger the notice for any question title containing the words 'best' or 'worst'.
Most of my code is released under the open source GPL license, and provided with a 'Pay What You Like' approach. Feel free to download and modify the plugins/themes to suit your needs, and I hope you value them enough to donate a few dollars.