You already have the ability to do that. I am not objecting to your suggestion. Some sort of control that could be used by the individual to control their own reading is fine. Some sort of forced segregation as kat suggests is folly and unworkable. It also segregates further the sharing of political views that might be disturbing, but also stimulates understanding among people. I much preferred the earlier discussions of Irish Republicanism when many contributed, to the ones we see now which feature mainly two players throwing precooked propaganda back and forth. If we are going to control political debate, let's just ban it.

The idea of segregation of discussion has no merit. Controls one could use to stay out of certain discussion already exist, but if one wants to make it more efficient, that is fine.