It might be useful as one factor in a complicated score function. You need a factor that diminishes the score over time, too, so it can't be quite as simple as

It might be useful as one factor in a complicated score function. You need a factor that diminishes the score over time, too, so it can't be quite as simple as you describe. In general it seems like you don't want a comment saying "This is as insulting as it is factually incorrect" to count as an up-vote.