Changing SQL and Agent Service account?

From: Brian (bpollard_at_idahodba.org)
Date: 07/28/04 

Date: Wed, 28 Jul 2004 08:28:04 -0600

Are there any best practices recommending changing the SQL Server/Agent
domain service account password? I assume you do not want to leave these
the same forever after install, and I have a service pwd change utility
without restarting SQL server, but not seeing a lot of talk about changing
these account(s). Should they not change just like any other priveledged
user?