Wear a mask, pay a penalty. That's the unusual message a Mendocino restaurant owner is offering his customers.Signs posted in the windows and at the register of Fiddleheads Cafe on Lansing Street read: "$5 FEE ADDED TO ORDERS PLACED WHILE WEARING A FACE MASK." And in the fine print below that message, it adds that anyone overheard boasting about receiving a vaccine would get another $5 surcharge.Owner Chris Castleman told NBC Bay Area some customers have paid the $5 fee while others have expressed shock and outrage. He says the "fee" ultimately is an optional donation as it goes to...