Imagine answering a question like "I think such and such candidate is not a very good person." and then it gives you a button where you can automatically post it to your twitter / facebook. When you read the post on your twitter, it says "I think such and such candidate is a very good person." but you don't notice the wording has changed. :/

I wonder if people would feel compelled to confabulate reasons why they posted that on their accounts. It might set of their "virus" radars because of the online context and therefore not trigger the same behavior.