Maybe Twitter did it earlier, but it seems that you can no longer view anything without logging in. The institution I work for, when we started using social media, felt okay posting to Facebook and Twitter partly because you weren't required to have an account to see what we posted there. Now that Twitter seems to have put all content behind the gates, I'm curious what we will do.
I so want to delete my personal twitter account, but I don't want to lose my ability to see what's there if needed.