C&D has zero legal weight. They're just relying on developers being conflict-averse. At my local hacker space, at least five members are in some kinds of protracted legal battles (five different ones)
You don't have to fight a C&D, you can ignore it. But they may sue you and you have to fight that. But they can also sue you without a C&D or even after you comply with one. The C&D itself has no effect, but it's the equivalent of a gangster pointing at his own eyeballs and then yours, "I'm watching you."
you've replied here several times, i understand your position on C&Ds.
a C&D is reasonably understood as an intent to sue if you continue whatever they want you to cease.
my comment can be read as "i just know that i wouldnt want to have to spend the time or money fighting twitter over it (where "it" = ignoring their C&D and being sued)"
