I am confused by this forum module because other things (ie blog, announcement, etc) have its OWN setting which allows me to choose who (ie. all users/annonymous users/register users/tc.) can post comments

However, for this forum module, there is none (atleast none that I can see in the "forum administration").  Instead, I have to set the ENTIRE module's permission (give the users edit access to the module) in order to allow users to post.  If that okay?  I am worried by setting the entire module's permission to allow for editing, that may somehow allow user to edit my module (instead of just allowing them to post.)