Just think that at international sports events Spanish players have no anthem lyrics to sing and fans are reduced to humming along (which they have taken to do wuite noisily in later years, something I find wuite amusing and am sure is done for the amusement value). The anthem never gets played at a domestic sports event unless the King is present (like, for instance, the final of the Copa del Rey - but it is the final of the national knock-out tournament and the King is in attendance). Every sports event in the US involves playing the anthem.

Those whom the Gods wish to destroy They first make mad. -- Euripides