Planr is dancing in the Grey, it\'s playing in that area where mods would keep an eye on them
The difference is that you resorted to a Full blown insult, and therein lies the root of your problems. Some people, tho antagonizing, do not actually step over the bounds, they dance on the lines and continue to do so until the \"victim\" crosses them.
If your chat and this happens, ignore them, and try to change the subject. If they still persist, copy the log and inform a Mod that someone is harassing you (which is what continuing to pester someone is called really).
If on a Forum, try to beat them at their own game. Think a few steps ahead and regonize a person as such. Plan your post, and keep an eye out for possible holes or examples that the Person may attack (Think of the faults of your post, before posting). If your Post explains your point, points out the issues, and then offers solutions, it severly limits what the other person can say. As well, you can also just try ignoring it, if it upright mocking the thread/post because of who posted it, see if you can get someone else to reply for you
(not a Alt account, but a friend)
Most Problems are 2 sided, the Aurothity, and the Community. We cant expect the Mods to be able to do everything and understand all, The Community also has to regonize the \"Bully\" as you call it, or else your just being baited across the line.