I added some required fields, and the spam bots just plugged in an alpha sequence and got past.
It would be helpful if a question/answer pair were an option. Users would see a question requiring a simple answer, examples:
Enter the sum of 5 and 10:
Country north of the United States:
Add an s to the word spammer:
Well using UBB version 7.5.3p2 does not help.
The current version is 7.5.8 .
Six upgrades after your version.
Since your version there have been many security upgrades as well as the stop forum spam plugin.
Also in your current version you could enable captcha as well as moderate registrations.
