Surely one of the great bugbears of the modern age is the flood of opinion sought and offered from sources which make that opinion automatically irrelevant. One of my favourites was Rolling Stones guitarist Keith Richards being asked about the death of Princess Diana. About as far as is possible from being an effete playboy sucking up to royalty Keef replied 'I never even knew the chick'. Others include any opinion of George Clooney except on acting, or of Bono except on singing.
My new favourite is 'Brian May (former guitarist of Queen): why I oppose the badger cull'.