When the website made a video about a few of the reviewers' Real Life trip to Washington, D.C. to talk to a politician about SOPA, they just put a black box in front of his face, with a caption noting that he doesn't like his face to appear on the Internet.
Some spoof film trailers made by Italian director Maccio Capatonda (real name Marcello Macchia) feature an entity named "the little" Riccardino Fuffolo, represented by a very tall man in a black trenchcoat and a white towel on his head. His face was partially visible during a parody of The Matrix's bullet time sequence, when the towel slipped and his chin and mouth were visible.
Eljay from The Three Virtues, a Franchise/Bionicle fan site, always has his face covered by a cardboard Miru.
Sen, Momo and Ai Channel: The mom of the titular kids' face is never seen. If the video does show the area where her face is (like if it's focusing on Aiko if the mom is carrying her), it's usually censored.
Over at Froghand, the chances of Froge revealing his identity is close to zero, given how he wrote an entire article on how to prevent doxing.
Binging With Babish host Andrew Rea frames each main shot he's in from his waist to his chin, in order to balance out his presence while cooking with keeping the focus on the food and the process instead of him. If his face is seen, it's only in short, incidental moments.