[gumby]

Implicitly, when you quote a tweet you are agreeing to a contract of adhesion (basically a shrink wrap license or "by using this site you agree to our terms"). Twitter even told people that the quoted text would remain.

Now site ToS usually say that they can change the terms whenever they want. But that's going forward: something you wrote in the past should be under the contemporaneous terms.

So I wonder if someone could successfully sue under California law. If successful, it would be a great improvement to consumer rights.