God no jumping, never jumping, it doesn't do anything because those "invisible walls" are not four feet tall, they're collision detectors, meaning you can't jump over them, adding jump would just make everyone look retarded hopping around, it's not much but it's one of the reason i prefer FFXIV community instead of the other mmo's, it just kills your fun when you're immersed in the system and you walk into a town and everyone is hopping around like it's wonderland or something.