You can also set some restriction on policy like only editors can read articles. To make articles appear in the result of a fetch for exemple, you just have to add the limitation parameter with an empty array :
And you don't have to implement access rules in templates witch are ugly and insecure by design. For instance: If one of your readers knows a few things about eZ Publish he can try to guess for other views you might have beside full and line, he needs to know the node id as well but not something that is to hard in a default ez install. It's even worse if templates decide on edit/delete access..