Unclaimed doesn't mean unowned. You are basically suggesting that Burnin/Zefir steal chips and give them to someone else.
I don't want to steal anything from anyone, but if these guys changed their minds, dropped out of the game and/or bitcoin completely or just are not interested in topic anymore, there is no reason to shut the chips (which will be useless in some months anyways) away for the next couple of years, because they maybe could come back one day and state their claim. The same about refunds, nobody knows if these adresses are still in use.
If someone shows up later and can prove his claim, there will be a way to handle this. Either by zefir, SebastianJu, burnin or others.