I don't think that you can stick to philosophical principles because those tend to be too simplistic and real life is messy. Twitter as a private entity should in theory have the right to do whatever they want. OTOH, their platform gives them influence over the democratic process. In theory people shouldn't be censored. OTOH it is easy to fool people with targeted propaganda.

Philosophizing is not going to get you anywhere, really. It's a technique of the past. There are many competing effects at play here. I think the more rational approach is to actually study the real world system to find a policy optimum that achieves a set goal. Philosophy should be relegated to figuring out that goal e.g. should it be democracy over all else or maybe individual rights or something else.