by Gordon McLeod.
OK I figured out how to set blind marking to on by default for assignments - so thought I'd share it in case anyone else would like to know.
In mod/assign/mod_form.php you need to amend the line
$mform->setDefault('blindmarking', 0);
to
$mform->setDefault('blindmarking', 1);
You'll find that at line 134 in version 2.4+ (Build: 20121230)
Regards, Gordon.