And then you wonder why people get upset with what you say.
You really should consider that the way things "pop" out of your mouth (fingers) first time around might not get across the exact message that you meant to say.
What this says to people (right or wrong) is that you know what you are thinking, and you feel that what you are thinking is important enough that you need to say it, but that your audience isn't important enough for you to bother making any effort to ensure that what your audience is reading is really what you meant. In other words your thoughts > your audience. Makes people think you are arrogant.
I pointed those paragraphs at Damon but he just happened to be the one to put himself into the position of a good example. I feel that this is really a rampant problem with internet communication. Many people pay very little attention to what they are typing. I find it very frustrating that a person asking a question can't spend the 15 seconds to re-read their post and make sure that they correct their grammer/diction so that people can understand what they are saying, not to mention make sure that the actual content of the question makes sense, and then expect people who do care about the situation to take their valuable time to answer said questions. Many times I've taken 15 minutes, 1/2 hr, sometimes more, helping people with problems only to find out that I didn't understand the original question or that relevant information was left out.
I think it all comes back to a matter of RESPECT for your audience.