Fans started lusting over Mark Zuckerberg ... founder was spotted surfing in Hawaii on a $12,000 eFoil remote-controlled surfboard while wearing a thick mask of white sunscreen on his face.

Ah, yes, our favorite 4th of July tradition: Mark Zuckerberg's America-loving post. This year, he's back surfing while waving ... cry from Zuckerberg's infamous sunscreen look, where he smeared ...