I just wanted to provide an update to this topic. Since this topic was created, we have actually updated our Free plan to include one Management seat. You can now remove spam and moderate content without having to come through our community.
To create your Management seat, an admin to the community can log into the admin section and enable a Management seat. The user with a Management seat enabled will then see moderation tools on all topics in their community.
Let us know if you have any questions!