VIPMaster
Your point about other users potentially not understanding the change is well-taken, and some of the other comments in this thread prove it (like a city's police department communicating exclusively via Twitter), but trying to make an open platform out of one that's fundamentally not (anymore, at least) seems like the wrong way to solve the problem.
Is this necessarily true? At this point, I would figure that people who continue to publish on Twitter are aware of its restrictions and continue to communicate there with that knowledge. If anything, one could argue that trying to access Twitter content without an account is what's actually inappropriate here, as posters can no longer trust the guarantees of the platform.
> Twitter is supposed to be a website where people can share ideas.
Twitter used to be a website where people can share ideas. Twitter currently is a website where people can share ideas with other Twitter users. If you post on Twitter now with the intention of being truly public on the internet, I'd say you're using the wrong tool for the job. Whether that's a good business decision or not is irrelevant; the fact is that Twitter has changed its purpose, and users should update their expectations accordingly, however they see fit.