If you want to share downloads with family and friends and you don't want them to sign in with your account everytime to use it, you have to make their PS4 the primary system for your account. If you don't know how to do this, follow these steps:

Login with your account on your family/friend's PS4
Go to the "Settings" tab
[ Register or Signin to view external links. ]

Go to "PSN"
Click on "Activate as Your Primary PS4"
[ Register or Signin to view external links. ]

Click "Activate"
[ Register or Signin to view external links. ]

Now they should be able to use your downloads on their PS4. They don't have to login to your account to play your games or use your PS Plus.