for jumping in...some people say don't pray nafeel salah and some say don't fast..these are nafeel ibadah and there is no control and there is no limit on nafeel ibadha..i know the word innovation but nafeel ibaadha don't count as innovation..Allah swt. himself mentioned in the Holy Quran..remember Allah with kathrath..so just praying five times i don't think it consider as kathrath until u add nafeel ibadha..Wa'Allahu alam..