Yeah but I bet at least half of people wouldn't notice, especially if you put something interesting on the other side of the screen for a second. Or you could r

Yeah but I bet at least half of people wouldn't notice, especially if you put something interesting on the other side of the screen for a second. Or you could render a bunch of overlapping fake warnings all over the screen, making it difficult to find the real one. Or you could put an exit fullscreen button and pretend to exit fullscreen when clicked, but you're actually still in fullscreen. Etc. I should probably stop giving the malware guys ideas...