Bird excrement was not involved this time:

Always the best line in the business: in order to give the fans everything they got coming to them, we're not giving them anything at all. This is how it looked yesterday, when New York magazine reported on a concert:

They're getting a rep for canceling shows - before this, their drummer hurt his arm exercising, but at the risk of betraying my ignorance, drummers do employ their arms in the course of the show, so it seems legit.

Now, the cryptic tweet:

That's often the case.