Introducing some kind of 'how interesting was that chat' rating would give users an incentive to liven things up; maybe the more interesting you are, the more y

Introducing some kind of 'how interesting was that chat' rating would give users an incentive to liven things up; maybe the more interesting you are, the more you get connected to other interesting people. ['course, definitions of interestingness vary plenty. Maybe you leave that in as part of the fun; maybe you introduce some kind of categories -- e.g. slashdot-style +5 funny, -2 offensive]