Has anyone else been as annoyed as I am about this dialog?  Every time I close a terminal which has a running child process, rather than the terminal closing and the child process(es) getting killed, gnome-terminal tries to protect:

I’m not unlike any other user: I don’t like unnecessary dialogs.

However as I’ve discovered, there is a fix!  Open up gconf-editor (Configuration Editor, not that you can find it on many menu systems these days) and browse to /apps/gnome-terminal/global and uncheck the confirm_window_close key.

Now you may return to killing your numerous terminals the way you’ve always enjoyed.