In the early days of NT4, I would never delete an account from the domain because I would lose the correlation between the SID and username in event logs and all related audit trails.
Is this a practice I should continue in Windows 2008R2?
How should locations with seasonal user accounts handle this? For example a school could give every student an AD account, and then disable them at the end of the semester. In just a few semesters, the quantity of accounts in "dormant mode" would grow quickly.
What is the best way to handle this situation?