Use preferably your callsign as your user name. Be aware of your email address you plan to enter here, some "mass providers" like gmail.com, verizon.net. yandex.ru etc. can be considered as untrusted. The best way is to use a personalized e-mail address containing a valid, verifiable amateur radio callsign. User name like g3xtj with email like firstname.lastname@example.org or WW4NN and email email@example.com is GOOD, another user john_thompson with email firstname.lastname@example.org is considered as UNTRUSTED and, finally, CialisWorth with email email@example.com is definitely BAD and his request will be rejected without any warning.
We urge you to change your signup details to meet the criteria above. We plan a site cleanup for May, 1st, 2009, where all users with signup options not meeting the criteria above AND who never visited this site since thweir signup will be removed.
Many thanks for your understanding.