user role for post creation

The users on my site are all subscribers but are able to create posts as I understand it they should only be able to read posts. I did have the membership plugin but was having problems with it and the classified plugin so I've deactivated and deleted the membership plugin. Since then I've also deleted the classifieds because we're not using them anymore. But shouldn't the default WordPress subscriber role now default to just read since the membership plugin has been deleted?