Editing WoW:Hooking functions (section)

== Removing existing hooks ==
Removing hooks is generally problematic: there's no way to remove a hooksecurefunc-based post-hook, and insecure hooks may only be removed in some situations. The difficulty arises from the fact that multiple addons may want to hook the same function -- and if any addon but the top-most in the hooking chain wants to unhook, there's no way to tell the hook on top of your function to call the function below. It is therefore recommended to simply make your existing hook pass arguments and return values directly through if you don't want to deal with the data. For example:
 local oldFunction, noLongerRelevant = someGlobalFunc, false;
 function someGlobalFunc(...)
  if noLongerRelevant then
   return oldFunction(...);
  else
   -- Original hook handling code goes here
  end
 end
Libraries may contain functions that allow you to "unhook" your method -- those operate primarily by moving the ignore switch further up the execution tree: if you remove your hook, it won't get called, but the library's hook function stays in place.