Hi is it possible to enable users to hide their email addresses from members being able to view them?

That is the default anyway. 

Is there a way to change the default?

Anyone?

Email address is visible only to Staff members.

I think the only way to allow users to show their email is to add a Custom Profile Field and allow them to fill it out.

Why on earth would you make anyone's email visible?

To get people drowned in spam?