Well said Lifeinasia but have you seen some of the emails between head of companies that the were latter used as evidence in the court. Many people do not think the same way as you do and go ahead and put just about anything in one. You would think it was common knowledge but we see it all them time.
PS you do your taxes online? Get bank statements online? CC statements online. Pay cc statements online, have a merchant account or ecommerce business, have an adsene account? All these are emailed now ever thought about that?