[brownell]

Excuse my ignorance... You're saying that if someone blocks you on Twitter you're no longer allowed to post something with their @handle? Or that they, as the blocker, just won't see it?

If it's the former, then I would agree with you. If it's the latter, and you're not actually blocked from posting (saying) anything, then where exactly is the violation?

[Taniwha]

it's the former, you can also 'mute' someone which is the latter

[s73v3r_]

I believe it's the former.