Posted by Chris White on February 20, 2010 at 2:51pm
We have received two bogus requests for accounts and denied both, but I would like to know how to set things so these account requests don't even make the queue for our admins.
Specifically I wonder whether it is possible to require, for example, to require that the first and last names fields differ, that the zip code must be either 5 or 9 numbers, or the phone number must have 10 digits with either spaces or dashes. Any of these--or a combination--would have defeated the requests.

Comments
Login Toboggan
Captcha and Image Captcha solved this for me.
If you don't like those, then Login Toboggan has an option to require a duplicate email field. This might help.
Jason Ament
amentcreative.com
Postcodes
If you require zipcodes to be 5 or 9 numbers, you'll be stopping New Zealanders and Australians from entering real addresses. This might not be an issue to you, but I thought I'd point it out.
Regards,
Nigel
Badbehavior and Mollom Modules
The badbehavior module http://drupal.org/project/badbehavior with Mollom http://drupal.org/project/mollom work great.
Badbehavior behaving badly?
I've looked at Badbehavior, but would be nervous about deploying it on my sites. How does it know the difference between a spam-bot and a legitimate agent like Google? There was one issue in the que from somebody that had realized Badbehavior had been blocking search engines for a month before he realized what was going on.
Mollom. That is all.
I started getting a few odd usernames, then it became a deluge.
For a good while, my little parish was getting more traffic from Russia than anywhere else. It got so bad I had to do a purge of fake users. They didn't do any damage (my permissions are tighter than Phyllis Schlafly's sphincter), but they were annoying as all get-out.
Don't be a dontbee like me. Install Mollom now. It'll stop them Rooskies in their tracks!
Mollom reports its results in graphic form, and my legitimate traffic is the dunes of the Outer Banks, while the spammers are the frackin' Rocky Mountains.
Install Mollom now.