1. You have no way of determining how accurate the information. As Abraham Lincoln said, "Not everything on the internet is true". Smart guy, that Abe!
2. Another quote: "You have no way of verifying the true identify of your correspondent, as it could be someone phishing you" - Peggy-.
3. And the final quote: "It is difficult to determine what is really being said without seeing the body and face language accompanying the statement. -Poe-