Has anyone had the experience where random users are generated on a site, as follows:

Date: 04 April 2014

First Name:

Last Name: London

Unit:

Street: 00000000

City: 11111111

Region: Alabama

Country: Afghanistan

Postal Code: 01/01/1970

Telephone: London

Email: [any random email address]

Unfortunately, the IP address doesn't seem to have been recorded, despite switching this facility on.

Does anyone know the best way in which I can stop this happening altogether?

Many thanks!

I'm starting to get lots of random accounts. They don't come with a profile, they are just subscribers. Why would anyone want to do this? They can't post because I don't have forums, etc.

Hi Sebastian. Is there a way so that I can "capture the user" in the database BEFORE sending a return email to the new potential and unwanted spam user. 
I can see that every time a specific country name is written in the user table, and I hope that I can create a trigger so that the user is automatically deleted. 
I am running an older version of DNN (pre 6.0) and I can't get the application to display the CAPTCHA image. 

Cheers