Designers must be aware of their role in social UIs and give the same thought to social dynamics that they would to legibility, scalability and others. They must be aware of what social friction they are introducing or reducing, and they need to ask themselves, “How will this UI make my user look to others?” and “How will this UI affect the quality of social interactions?”
Facebook and How UIs Twist Your Words
Chantal Jandard

Agree, designers must be aware of this and should place the UI accordingly considering all dynamics on and off the screen…

Great work and there are plenty of scope to do in-depth research and analysis.