There's an indication of a diminished mental capacity and acuity if you are unable to pick out gaping spelling errors in a piece of your own work. For example, most decent university professors will knock marks off for incorrect spelling and grammar on an exam or paper. It indicates complete unprofessionalism by the writer.
That not being the case, then chances are you have a complete disrespect of those you are talking to, in the sense that you do not deem them important enough to construct clear, concise, writing as mentioned earlier by snurx.
Btw.... the word 'beginning' does not have 3 g's in it.
[/picky]
Edit: Beaten by T&F. Doh!