yeah, it's a pretty shady idea, keep your shields full, engage cruise, restock shield batteries, and go back to pirating again at the same place.
there are some situations where this would be acceptable, a few where it wouldnt work, personally i'd rather keep my head down and ether shoot someone down or leave the system.
yeah, it's not against the rules, it's a loophole, dont be a penis with it, be excellent to eachother.