Grandpa or Kate Beckinsale? On Tuesday, May 7, the actress, 50, shared six posts to Instagram, where she dressed as an old man to mock trolls who have been dissing her appearance. “New deal. This is all you’re getting. Hope it is less triggering and more what you consider age appropriate. Sayonara b——,” she penned alongside one of the uploads, where she wore a white tuxedo, bald cap and even added makeup to simulate wrinkles. In one of the clips, the Pearl Harbor alum sat in a wheelchair as she held a white cat in her arms, while in another, the costumed celeb simulated falling out of the …