While there is some originality, for the most part people regurgitate the same ideas and then are offended when people aren't impressed. You think you're the first person to ask for blue mage/time mage/dancer etc etc? Other ideas seem more like fanfic that would never fit into a FF game. To me they sometime seem more like pointless "vanity" topics because the dev team will already have plans for jobs, they're not going to take random ideas from the forums. These weird and original jobs will never become reality so while I'm sure it's fun for the OP, what purpose do they have really?
Though I agree there's no need to be pointlessly mean, personally I just ignore them.
