Will Smith was just defending his wife, Jada Pinkett-Smith, during Sunday evening’s Oscars ceremony, but for some who share the same medical condition, they felt protected, too. After presenter Chris Rock made a joke about Pinkett-Smith’s bald-headed hairstyle — an outcome of the “Gotham” star’s condition, alopecia — Smith socked him on stage. “Ex on the Beach” contestant ZaraLena Jackson, who also suffers from hair-loss illness and is an advocate on social media, is standing by Smith, 53, and his actions at the Dolby Theater. The 29-year-old reality star told SWNS that while she doesn’t advocate for violence, Rock, 57,...