Decoy Ships (not illusion or other stock features)

Make a cheap ship with no weapons that has Statcount and classicication as a KOL battleship, but it only costs a few credits as it's made of styrofoam, and litter your grawitywells with them so that enemy scouts see them and think you are going to invade (if they don't look too closely, you might get away with it

   It would only be fair that there are ways to recognize it as a decoy, but nothing too obvious...