This sounds like a great way to reduce spam and trolling. It would give you the choice to see discussion by friends_and_family group, your professional_colleag

This sounds like a great way to reduce spam and trolling. It would give you the choice to see discussion by friends_and_family group, your professional_colleagues group, your casual_social_friends group or whatever instead of by the random_youtube_comment_trolls group. A possible downside would be that the filter bubble and confirmation bias would be web-wide if a user only selects groups that they agree with (as many would be likely to do).