It would be a good thing of more services delete old unused accounts automatically, like Yahoo Mail does. I often come across accounts that I created years ago but haven’t touched for almost the same time. I am only reminded of them when these services change their TOS or privacy policies. Then I go and try to delete these accounts, sometimes without success, because it is impossible to delete the accounts themselves. Then I have to write a support request or send a mail to a contact address, which is not always successful as well.