This. He did it for the entire American Idiot tour (don't recall if he had done in previous tours too), so definitely premeditated. And I have an imprinted image of of Billie lying face down on the stage floor, with his hand down his pants, and moving as if kind of fucking the floor, which lives rent free in my mind, which I think (but could be mistaken) comes from one of their shows I went to during the 21CBD tour 😅 To this day Billie still urges the crowd to "go fucking crazy" during that song when they play it. In their show in Paris last summer this resulted in me getting crushed against the barricade, and losing a few of the people I was with at the show
Ultimately, the answer is this: