Actually, there is another thread in the Links 2.0 Customization Forum that discusses auto-submission...You can write a LWP script that can auto-submit and by-pass the db_referer....
That is why adding something like random codes before submitting or having all users manually login is much better...
I've used logins both in Links 2.0 and LINKS SQL and I've never been spammed (*knock on wood*).
Regards,
Eliot Lee
http://anthrotech.com/