Chicharito addressed his 6.1 million followers with a message that has drawn condemnation across social media.
The 25-year-old Swede was sent home by manager Eddie Howe as transfer rumours continued to swirl.
Its creator remains unknown, but the buzz around town suggests Banksy.
It marks the third consecutive year that the traditional season opener will not be held at Camp Nou.
Sylvan Ebanks-Blake alleges a procedure performed in 2013 prematurely ended his football career.