Question: Why is it that so many people who post a question or answer cannot put together a simple sentence? Is the education system in America so bad or do people that post here just not care about whether their spelling or grammar is correct?

Answer: Alot of it has to do with the shorthand used for text messages and IMing. Because of the rapidness of the conversation a generally accepted form of shorthand developed to increase the rate of conversation. If you could look at the people who demonstrate these forms of bad grammar on message boards like this one, I would be willing to bet they are high school/early college aged who grew up conversing on the computer. To them the commonly accepted rules of syntax are loosened for convience. Therefore they are following a commonly agreed upon set of rules, which in a way make this a unique language while derived from english, follow different rules. Check out the source for examples.
This question from the Yahoo Q&A forum is categorized in the topic: Computers & Internet