If your spell-checker/grammar-checker annoys you, you can turn it off or change the way it works. In Microsoft Word 97, click on Tools, then Options, then Spelling & Grammar. You will see several optional functions you can check or uncheck. Under "Writing Style" you can select Casual, Standard, Formal, Technical, or Custom; and if that doesn't give you all the flexibility you want, you can click the Settings button and it will bring up an even more detailed list of options.

A guest above mentioned passive sentences. Passive voice really is a problem in business communication. I have seen managers issue orders like "project schedules will be turned in every Friday" without saying who was supposed to turn them in. People would read this and wonder, "Is he telling me to do it? Or just informing me that someone else will do it?"

If you don't care about spelling, that's your business, but if you ever post lyrics or information about music, consider that unorthodox spelling may make it difficult or impossible for anyone to find that information with a search engine.