using debian system-created user accounts?

Does anyone use the backup user for doing local system backups? or do you create a new user specifically for that?

I ask because backup is debian-specific uid 34, provided by the base-passwd package. But reading /usr/share/doc/base-passwd/users-and-groups.txt.gz, i find only this:

backup    Presumably so backup/restore responsibilities can be locally delegated to    someone without full root permissions?    HELP: Is that right? Amanda reportedly uses this, details?

So fellow admins: do you use debian-allocated accounts (i.e., with uid < 100) (other than root) for any local (non-distro) purpose? If so, when do you do so? if not, why not?

Tags: backup, systemuser