The only rules I follow are the ones I make up! I do try to be consistent with seam allowances and try to keep stitching even when quilting, but anything else that people say or write or publish are just suggestions. Do what makes you happy and do your own thing. As long as you are happy with your work--your the only one who really matters.
I agree if you plan to enter a large show, they do have certain rules you have to follow, but they are just that, rules to follow if you want to enter.
I also agree that "Quilt Police" is kind of a joke. I actually have a shirt that says "Quilt Police". Has a little dude with rulers, markers, tape measure and rotary cutter etc then Quilt Police in an arch over his head. Get lots of laughs with it. Found that at a quilt shop right before I hosted a quilting bus tour. My fellow hostess and I both got one. Had a ball with it on the bus.