Kharma has a unique way of dealing with it, lol. She pees in their faces, or, if they're REALLY obnoxious, she'll crap. She likes to let them know how insignificant they are and exactly what her opinion of them is. The farthest she's ever had to go with any of them is a quick airsnap a few whisker-widths away from the face. Tallulah's been the only one fool enough not to back up
Even the neighbor's white GSDs that are notorious for aggressive behavior give her a wide berth now. I think the fact that she's so SUDDEN -- she can be facing away and do an instantaneous 180 and finish a snap in front of the face in the time it takes the other dog to almost finish their lunge -- changes the dynamic, lol.