Political Questionnaires miss the Biggest Question

I think that all those online political questionnaires that tell you which candidate most closely reflects your views should start with a simple question:

"Do you support slavery?"

If you answer yes, then you proceed to the questions as usual.

If you answer no, you are redirected to a page that says:

"If you don't support slavery, what the hell are you doing imposing your views on others through the political machine?"