He can play guitar, I'll grant him that, but I've hated his music since I first heard it, it's always struck me as soulless and empty. That was long before he revealed himself as a despicable twat.
This could be a publicity stunt, or not. I've heard that the only reason the guitar was even there was that the guitarist was rehearsing for a Prince tribute. If this is true, it makes me suspicious that it was a setup, and it almost serves him right for wanting to pay tribute to a douchebag like Prince. OTOH living in this area, I've heard enough stories of Prince's bizarre conduct over the years to think it may not have been preplanned.