It's your quilt, do what you want to do. Ignore the quilt police, or at least ask why when someone tells you what you 'should' do, especially when the word 'should' is accompanied by 'always'.
Having said that, some battings require that quilting be no more than 4 inches apart, some 8, some 10.
This site explains why better than I can.
http://www.generations-quilt-pattern...distances.html