When tweets contain obviously criminal threats, law enforcement ought to be able and willing to get whatever information Twitter has on the senders, at least when the target files a complaint, and prosecutors ought to follow up.

How is this so easy in copyright cases and so hard in cases like this? If a few theoretical dollars in royalties count so much more than safety of innocent citizens, things really are upside down in favor of big money.

I realize there are limited LE and prosecutorial resources, and they have to prioritize etc., but threats like these are prosecuted in "real world" cases all the time. And a few convictions in egregious cases (like this), reported in the news, would probably exert a civilizing effect on the lowlife of Twitter (maybe just motivating them to go elsewhere).