To me the main issues revolve around "wrong" or opinionated answers:
eg: ask jelly if dietary fat is bad? depending on your circle you'll get a different answer. Lots of nutritionist friends trained in the 70s? you'll get tonnes of "yes" answers. Lots of friends who follow the high fat diet ideas (see: http://www.dietdoctor.com/science ) you'll get lots of No answers.
And this is the rub, to the extent that your friends are homogeneous, is the extent that this just becomes an echo chamber of potentially misinformd ideas.
One of googles advantages is that I get information outside from of my circle and bring it (with me) into my previously uninformed circle.
eg: ask jelly if dietary fat is bad? depending on your circle you'll get a different answer. Lots of nutritionist friends trained in the 70s? you'll get tonnes of "yes" answers. Lots of friends who follow the high fat diet ideas (see: http://www.dietdoctor.com/science ) you'll get lots of No answers.
And this is the rub, to the extent that your friends are homogeneous, is the extent that this just becomes an echo chamber of potentially misinformd ideas.
One of googles advantages is that I get information outside from of my circle and bring it (with me) into my previously uninformed circle.