We absolutely do. If you know some people are fundamentally wrong, it is absolute waste of time to entertain their world view. Can they still come up with somet

We absolutely do. If you know some people are fundamentally wrong, it is absolute waste of time to entertain their world view. Can they still come up with something useful in the distant future? Sure! Can they change given enough time and information? Sure! Can what you think is fundamentally wrong change given enough time and information? Sure! So, you can prune your blocks every news cycle or every 2 years or 5 years or 10 years or whatever you are willing to tolerate. Grouthinking is necessary to build a new ideology, which may sound wrong today but may be the ideology of the future. To build your own groupthink and allow for others to have theirs, it is necessary to have several different independent ones co-exist. While companies like Facebook has helped to some degree, companies like twitter rely on keeping the debate going at all costs which is why tools like this are great.