Using Disqus with the Q&A plugin

Hi, I'm hoping to use the Q&A plugin on my company's website as a Support Centre for customers. Unfortunately because of EU data protection regulations/company rules I am unable to store users' personal data so that means no user registrations allowed.

I was wondering is there any way around this that wouldn't leave me open to spammers (the site's daily traffic will be significant in volume)?

Are there any third-party options (such as Disqus) that could handle the user registration side for me (ie they store the personal data). I know there is a Disqus plugin for WP but not sure if it could work with Q&A.

Hope that makes sense!