And if you wanted to, you could open the document up in WordPad/TextEdit (depending on OS; apparently NotePad is not good to open Config.wtf in), and change the preferences therein, and they would apply to your game. It's pretty simple. For instance, the line for the profanity filter reads
SET profanityFilter "0"in my Config.wtf, since I have it turned off. If you wanted to turn it on, you'd change the 0 to a 1, and it would read
SET profanityFilter "1"; save the file, and your profanity filter is now turned on next time you run WoW. Note that you may not have a line for all possible options if they're at default values.