As much as you want. The di in dialogue stands for two. I sometimes speak not so much for the person I am talking to but for those who will read what I am saying.Once we have said all that is needed to say what is the point of continuing to engage in a back and forth. We have to decide when have we come to that point. What happens often times is this you say something someone disagrees with but cannot answer intelligently so they come in starting a cat fight. They don't have to win the cat fight. They just have to get you to give energy to it. If you do give it energy then those who are reading and who are intelligent will see the chaos and move on. You may get the last word in and put the person to shame but they will have accomplished their goal which is to keep people from listening to what you have to say. Solutions: 1.Avoid as hominem 2. Read what you have typed a few times before posting it. If someone said that to you could they expect a positive response? Then why get offended when you don't get one? 3. Remember you don't know he poster and they don't know you so why take what they said personally. 4. You don't get banned because smaddy provoked you to break the rules. You get banned because YOU chose to react in a way that broke the rules. This has been a public service message brought to you by Da River.