I'm afraid that one is just a little too close to reality for comfort! Ah yes, "a lively exchange of idea" ... each person can freely show their support for the idea! People need more opportunities to share a single homogenous opinion!
Let's start the list ... Anthropogenic (human caused) Global Warming (AGW), Gay Marriage, Income Inequality, Abortion, THE BEARS SUCK!
Hmm, well that last one DOES seem like something that we OUGHT to all agree on!