Voting down expired deals
My and Mikes take has always been this: Don't vote down an expired deal just because you couldn't take advantage of it. Flag it 'dead' instead to let others know it doesn't work any longer.
On the other hand you don't want to vote an expired deal up either because short lived deals have less value and there is no reason to give a vote to a deal that lasted only a couple hours
What do you think? Is voting down an expired deal appropriate?