Social networks and social responsibility

It so happens that social networks are the strongest tool to influence the hearts and minds of people. The interests of people in social networks is not difficult to analyze the popularity of games - one of the top areas of the game - the struggle for rating. I would like to suggest that the owners of social networks use such weaknesses of people, which is called for peaceful purposes. What would be clearer about what I'm saying, I will give an example.
For example, in the blood collection points each unique blood number can be given to each blood donor. The introduction of this number in the social. networks could give some rating advantages to a person, some sort of distinction or additional features available only to the owner of such numbers. This could, at a minimum, arouse curiosity in people - “what kind of signs are these?”, And at a maximum would serve as an impetus for taking part in something very necessary for people around us.
Although I don’t really believe that it is possible, McDonalds and the most voracious Facebook user will appear in social networks, but I think I still had to write.
I would like to see in the comments your thoughts on how you can still draw people’s attention to social problems on social networks.
Also ready to talk with representatives of social networks.