Remove hidden users

i used the "dscacheutil -q user" command to list the hidden user accounts on my machine.  one of them...
name: _pencomm
password: ********
uid: 216
gid: 216
dir: /var/empty
shell: /bin/bash
gecos: Livescribe Pen Communication User
was created when i installed livescribe on my machine.  i've since removed livescribe, but this hidden user account remains.
how do i get rid of it?!?
thanks.

This command should delete the user:
sudo dscl . delete /Users/ _pencomm
Further queries should be made to
https://discussions.apple.com/community/mac_os/mac_os_x_technologies#/?tagSet=10 48

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