pgbouncer install script create home dierctory - bug ?

I have been surprised by pgbouncer install creating a home directory as
shown below («useradd -m» is the interesting bit).
«-M» is used to prevent home directory creation. Is there a typo or an
expected behavior?

$ rpm -qp --scripts pgbouncer-1.5.4-3.rhel7.x86_64.rpm
warning: pgbouncer-1.5.4-3.rhel7.x86_64.rpm: Header V4 DSA/SHA1
Signature, key ID 442df0f8: NOKEY
preinstall scriptlet (using /bin/sh):
groupadd -r pgbouncer >/dev/null 2>&1 || :
useradd -m -g pgbouncer -r -s /bin/bash \
        -c "PgBouncer Server" pgbouncer >/dev/null 2>&1 || :
touch /var/log/pgbouncer.log
chown pgbouncer:pgbouncer /var/log/pgbouncer.log
chmod 0700 /var/log/pgbouncer.log
postinstall scriptlet (using /bin/sh):
chkconfig --add pgbouncer
chown -R pgbouncer:pgbouncer /etc/pgbouncer
preuninstall scriptlet (using /bin/sh):
if [ $1 = 0 ] ; then
        /sbin/service pgbouncer condstop >/dev/null 2>&1
        chkconfig --del pgbouncer
fi
postuninstall scriptlet (using /bin/sh):
if [ "$1" -ge "1" ] ; then
        /sbin/service pgbouncer condrestart >/dev/null 2>&1 || :
fi


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Cédric Villemain +33 (0)6 20 30 22 52
http://2ndQuadrant.fr/
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