You can assure every post is approved before being posted when you set up a new term, using the Moderation section of the Advanced Options.
You can also adjust these settings by navigating to Aggregate > Manage Terms and clicking the edit button on a term.
Click the Moderation tab and ensure you have configured the following settings:
This way, ALL content arriving into your stack will be queued for you to review. You can choose to either Publish or Disable each post via Curate > Manage Content.
You are also able to assign tags to each piece of content at this moderation stage, if required.
For extra security you can also activate the Bad Word Filter, which will automatically disable content containing offensive language.
Still having troubles? Submit a Support Ticket.