I don't disagree with your suggestion, but when you're closing up shop, there's often a heck of a lot more pressing issues on your plate than wondering whether

I don't disagree with your suggestion, but when you're closing up shop, there's often a heck of a lot more pressing issues on your plate than wondering whether someone will be able to view your long-dead site after you've laid it to rest. Being a dick is a possible reason for not doing this, but there's a lot of others that don't require or imply malice.