Big banks and bank stocks, like Citigroup, don't always conjure up the most warn-and-fuzzy feelings for investors, but does that mean people shouldn't own them?

In this segment of The Motley Fool's everything-financial show, Where the Money Is, analysts David Hanson and Matt Koppenheffer discuss owning shares of companies that some people deem unethical and how it can keep some investors up at night.