Butler's comment of "shout-out to all the bands still playing actual instruments at this festival" during the show was all it took for Deadmau5 to lash out at the singer and his band:

deadmau5 tweeted, "arcade fire needs to settle down. some dudes devote their lives to instruments, others to electronic composition by cpu, dafuqs yer problem?"

The "Ghosts N Stuff" producer was just getting warmed up, unleashing a string of tweets on the subject that included a pointed dig directly at Butler's band, adding the failed hashtag, "#do youevenscorebro?"