Remember that even though the algorithms may be based on a scientific formula, everything you put is "self-reported" so it can only interpret what you answer.

Also, I do not think that people are competing to have a bigger score when they post the results, usually people seem shocked by the results and just putting the number up is their initial thought.

Its just a tool, like an online calculator, if you disagree with the answer, alright. It means nothing if you don't want it to mean anything.