What are "private and friends only settings"? Answered

In the Instructables Terms Of Service (which I recently quoted at a particularly offensive user), there's an interesting parenthetical comment: "Should any Content be reported to Instructables as being offensive or inappropriate, Instructables might call upon the poster to retract, modify, or protect (by means of private and friends only settings) the Content in question ..." Could Rachel, Eric, or someone give us some guidance on these "private and friends only settings"? I haven't seen such a thing in my profile. If this text refers to an earlier version of the I'ble user interface which no longer exists, I think the TOS should be adjusted accordingly. Cheers, Michael Kelsey