i really hope this works.

extra/build.conf.sample

@@ -74,7 +74,8 @@ LOGFILE="${BASEDIR}/logs/$(date +%s)"
 # What should the regular username be? (Automatically logged in on boot)
 REGUSR="${UXNAME}"
 
-# Should the REGUSR have a password? IF THIS IS NOT SET, THE PASSWORD WILL BE BLANK!
+# Should the REGUSR have a password? IF THIS IS NOT SET, PASSWORD LOGIN WILL BE DISABLED!
+# If you wish to have a blank password, use the string "{[BLANK]}".
 # Do NOT use a plaintext password here. You will need to generate a salted and hashed string
 # in a shadow-compatible format.
 # Debian can do this with the mkpasswd utility (it's in Arch's AUR as debian-whois-mkpasswd):
@@ -88,10 +89,20 @@ REGUSR="${UXNAME}"
 # /sbin/grub-crypt --sha-512
 # The end-product should look something like this:
 # $6$aBcDeFgHiJ$Yh342vFH7MOjPNu9InFymD1Dd42i5cFsr1cTWdpKGNIkbRGR/ZKQDRPJ1ZeeGb7y894Tfh3iWZIJKu3phlsqQ1
+#
+# Note that if you want an automatic login, this is *not* where it would be set.
+# It should instead be controlled via overlay/etc/systemd/system/getty@ttyN.service.d/autologin.conf
+# In the following format:
+#  [Service]
+#  Type=idle
+#  ExecStart=
+#  ExecStart=-/usr/bin/agetty --autologin <USERNAME> --noclear %I 38400 linux
+# (where N is the TTY number). Alternatively, if booting to a GUI, it can be set as according
+# to that GUI (e.g. for LXDE, overlay/etc/lxdm/lxdm.conf, "autologin=<USERNAME>")
 REGUSR_PASS=""
 
 # Same exact thing as REGUSR_PASS, but for the root password (i.e. if no password hash is
-# specified, password login will be disabled).
+# specified, password login will be disabled, etc.).
 ROOT_PASS=""
 
 # Do we have enough horsepower on the build system to jack up the resources we throw at building?

lib/mk.chroot.sh

@@ -213,12 +213,18 @@ EOF
     if [ -n "${REGUSR_PASS}" ];
     then
       ${CHROOTCMD} ${i}/ "echo ${REGUSR}:${REGUSR_PASS} | chpasswd -e" >> "${LOGFILE}.${FUNCNAME}" 2>&1
+    elif [[ "${REGUSR_PASS}" == '{[BLANK]}' ]];
+    then
+      continue
     else
       sed -i -e "s/^${REGUSR}::/${REGUSR}:!:/g" ${i}/etc/shadow
     fi
     if [ -n "${ROOT_PASS}" ];
     then
       ${CHROOTCMD} ${i}/ "echo ${root}:${ROOT_PASS} | chpasswd -e" >> "${LOGFILE}.${FUNCNAME}" 2>&1
+    elif [[ "${ROOT_PASS}" == '{[BLANK]}' ]];
+    then
+      continue
     else
       sed -i -e 's/^root::/root:!:/g' ${i}/etc/shadow
     fi