Via sametmax
If you’d like to prevent daemons from starting after installing a package, just toss a few lines into /usr/sbin/policy-rc.d:
cat > /usr/sbin/policy-rc.d < < EOF
echo "All runlevel operations denied by policy" >&2
exit 101
EOF
-
http://major.io/2014/06/26/install-debian-packages-without-starting-daemons/