Spamming problem

Hello Everyone,

I use a combination of Joomla 3.X with EasyBlog and EasyDiscuss to manage my teaching website. My teaching website is used primarily by myself and my students, but there are other educators and parents that use it as well.

My goal is to have my students blog, but no one else. I recently started receiving SPAM posts in easyBlog. Is it possible to still allow new users to create Joomla Accounts that give them access to the easyDiscuss forum, but not the easyBlog system?

I'm looking for a solution to lock down easyBlog once I have my student accounts set up so that ONLY students can blog, and no one else.

Thanks for your help,
Todd