stop user registrations spam

[2cool]

Hi recently received many joomla user registrations.
If I disable user registration it also prevents virtuemart shoppers to register.
So I need to keep registration enabled because using virtuemart.
Is there a proper way to fix this?

Regards,
Pas

[iWim]

1. Use Captcha
- Enable Captcha in Joomla Global Configuration
- Enable Captcha in VirtueMart Configuration (Shop) *
* Unlike what the label in VM configuration says, it is not limited to recaptcha.
You can use any captcha.

https://extensions.joomla.org/tags/captcha/

My recommendations:
I use Aimy Captcha-less Form Guard: https://extensions.joomla.org/extension/aimy-captcha-less-form-guard/
HashCash is back for J5, I used to use it on J3 sites and was also very good: https://extensions.joomla.org/extension/hashcash/

2. Enable Registration needs Product in Cart
In VirtueMart Configuration (Checkout) enable Registration needs Product in Cart.
This way only people who want to buy something can register.