Where are the rules or "guidelines" for machine quilting? Anytime you stitch in the ditch you tend to cross stitching lines. Why can't you cross?
The only reason I'd think you can't is because it is actually harder to not get tucks in the fabric because of the puffiness of the batting. If your batting is really low-loft, that makes it easier, of course. Not crossing lines would help that not happen.
But anyway...WHERE ARE THE RULES for machine quilting? I'm making a bunch of tops and actually want to buy some low loft batting and try FMQ on my Janome 7700. It will be a first for me as I've only stitched in the ditch.