Thank you for your interest in your product.
You can set the USER BADGES by going to back-end > Engine Setting > User Badgers (http://i.imgur.com/EoZ7sWV.png)
Unfortunately, QAEngine Theme has not supported to set up the user who has 0 point can’t answer the other question. It might be achievable with custom coding but that is beyond our support.
We launched our customization service in April. So if you would like to use our service, please send an email to email@example.com with detailed information:
+ Your customization requirements,
+ Budgets limitation,
We will consider the possibility and reply you soon.
If you have any other questions, we’d be happy to answer them!