{include} macro should be optionally invisible

the

{include} macro can be useful for creating mixed public/private page content (is there some other way to do this?). So if I'm making my personal page, I want our company to see my phone numbers, but not anonymous users. I did this by creating a public space, putting my page there, then using {include}

to include my "phone number" page back in the corporate (private) space. The problem is when I'm anonymous, I see the "unable to render" area where the include was. I'd like it to just be invisible.