Maybe there’s some legal element I don’t understand, but this ruling seems wrong to me. Not that I don’t want to see the Donald discomfited in every way possible, but
Twitter is a service provided by a private company, it’s not a public forum; and
Blocking people on Twitter doesn’t impede them from saying whatever they want to say, and saying it on Twitter. I don’t see how anyone, including POTUS, has an obligation to listen to anyone and everyone.