We've Got What's Been Going Around
Apparently this one is going around again:
Participating in a boycott of selected oil companies will lower gasoline prices.
According to Snopes, this one has been around since 2001.
Why do people think that information in a chain letter is credible? And why do people think that the person who sent the chain letter has thought of something that no one else has thought of before? Just because the reader has never looked at that way doesn't mean it's never been conceived of before.
Simple rule of everything in life: If it seems too good to be true, it probably is. Before you forward something to your email address book, do ten minutes of research and you'll probably just end up deleting it.