If you didn’t know already, MS Word can track your changes as you revise documents. If you later post your document in a publicly accessible forum (like on a web site), be aware that people can dig into your document for the old words you’ve carefully deleted out when making your final copies. some of these rough draft sentences can be potentially embarrassing, as you can see here. It’s not exactly playing fair to dissect documents like this, but you yourself should know that your words may be resurrected against your wishes.