@rickmaggio Our plugin is submitting the new users for you as the plugin was designed to do. We do not filter them because we assume that when a user is added to your site, they should be synced. That being said, I think there are some options for you to stop this from happening because it’s quite common when you don’t have any spam protection enabled.
1. Enable Double Opt In on the Mailchimp Audience. This will provide a filter for you that would force the verification of their email before being added to the audience.
2. Use a security plugin for your WordPress install to prevent robot signups. You may use plugins like Google Captcha, or a Honeypot plugin etc. to accomplish this. We are not affiliated with any specific plugin(s), but there are plenty of options in the wordpress ecosystem for you to choose from.
We feel as if either one ( if not both ) of these should be implemented into your store in order to provide a basic level of filtering which you desire.
Let us know if you have any other questions!