Considering the rather poor heat-to-light ratio in this discussion, I'm not sure that "get as much discussion as possible" is a terribly good goal. In any case,

Considering the rather poor heat-to-light ratio in this discussion, I'm not sure that "get as much discussion as possible" is a terribly good goal. In any case, there's a "tragedy of the commons" risk here: every submitter, considered separately, wants to get their submission read and commented on, so every submitter wants to tweak their titles to be "empirically effective", and if that determines the actual titles then we end up with a front page full of sensationalist titles, all of them less informative than if everyone had refrained from attention-grabbing. And then everyone is worse off.