Though Hoop.la supports automatic comment spam protection (on some plans), if you have a public community it may benefit you to always moderate all posts by users that have a limited track record posting to your site. That way, you can ensure that these "newbie" posts are given a once-over before being actually published on your site.
You can handle this using Hoop.la's Recipe functionality. (Recipes are automated workflows for your site.)
in your admin control panel, go to Basics > Recipes and then create a new "Moderate Content" recipe.
Give your recipe an appropriate name (like "Moderate Newbies") and then add a condition for "Author Post Count". We will set the condition to be "Less than 3", meaning that if the community member has less than 3 published posts, then the new post will go into our content moderation queue for review (and will not be "live" until an admin approves it).
You could use a different (or additional) condition, if you prefer, like Author Post Count, if you want to adjust your scrutiny conditions more broadly.
This way, the first couple of times someone in your community posts, they will be subject to automatic review, but thereafter they will not.
It's a simple way to keep your eyes on the "new guys" until they have proven they can be trusted to post according to your site's guidelines.