This seems to be real -- Microsoft has AUTO turned on "sharing" such that MS Word is now always "online" and will continually share your writing in order to build their LLM (Large Language Model) without your consent. Instructions are below (white text for Windows, black text for Mac)

All lines are straight and parallel

This is called the coffer illusion. There are 16 circles in this picture. Once you see them, you can't unsee them.