I think that question stands in the wake of reading the article. People seem to arguing that the language used constitutes a threat; I don't see that in the slightest. It isn't overtly friendly, but it isn't menacing.
Well when the people who are about to seek legal action against tweet in public "It's going to be bad week for you :-(" because they're going to make it one, then yeah it kinda sounds like a threat.