Let Your Users Fill In The Blanks.
You've probably taken a Myers-Briggs pesonality test at least once in your life. You've possibly reacted with some surprise to the first personality signifier, the E or the I (which labels you extravert or introvert) because you didn't see youself as introverted. And you would have been very wrong because the Myers-Briggs' axis is not the same as the normal societal extrovert/introvert delineation.
Such presumptions abound in the corporatisation of social media. The "media" isn't about indiscriminate broadcasting of messages under the guise of socialising. The "social" isn't about transferring work and costs to you users under the guise of a conversion to collaborative media. But many organisations insist it is.
Similarly, true excellence in user experience lies in facilitating whatever users want, whenever they want it, but all too often user interfaces are about what someone else belives their user wants. They imagine they're providing a blank canvas but, in reality, they're providing their own interpretation of "blank".
If you assume or dictate, you have to be absolutely sure you're right. If you're prepared to be proactively reactive and truly put your users (with all their vagaries and demands) at the centre of all that you do, you're far more likely to find out what it is that is right.