This is an open forum so as an admin I will allow up to three personal comment attacks to anyone (I will determine if it is personal) after that the comments will be deleted. If you feel someone is personally attacking your person inform the admins. Remember three personal attacks in any thread.
There is no hard and set rule as to what constitutes a personal attacks so the admins will be the deciding factor. All post are submitted for admin approval so any post that are attacks will naturally be rejected.