Thank you for taking the time and looking into this issue
Why are you not using recaptcha? The internal picture captcha is easily broken and the word captcha if it doesn't change regularly then bots are just custom changed so it gets past them. Do you not have a web admin? Do you guys need help in that department? I love hammerwatch but it hurts me to see nothing in the community or wiki.
Anyways if you are not able to use recaptcha then some suggested word captcha
1. What is the fifth letter in hammerwatch?
2. What is two plus one? (never want to do numerals)
3. How many finger and toes does a human have? (including thumbs)
These are things anyone would know.
Plugin:
http://custom.simplemachines.org/mods/index.php?mod=1044I might even build you guys a new template because this one is so plain!