Not to worry, we're all good.
there are few things that get me realy mad, and we don't talk about them here
Bleed through isn't something I've considered. The inks used are actually very thick. Think more like colored grease instead of ink like you'd get from a pen. Additionally, the image side of most papers used is coated with a substance that keeps the ink on the surface. Usually white, it also makes the colors brighter.
Steve B