Hi
Just had to find a solution for a client who started to get bombarded with spam via the "ask a friend" form on the product page.
The solution I found here: http://gruz.org.ua/en/about-joomla/34-virtuemart/6-virtuemart-ask-seller-captcha.html (http://gruz.org.ua/en/about-joomla/34-virtuemart/6-virtuemart-ask-seller-captcha.html)
Maybe something similar could be built in as standard?
Regards
David