News Three PC companies in hot water with FTC over warranty practices – US agency says buyers can open their products without voiding warranty

Asus has already been in trouble with the FTC over warranty issues which means they would not be included in something like this. Any action that would be taken against Asus would likely be far more severe and require investigation. I wouldn't be surprised if the recent industry focus on Asus isn't what drove increased scrutiny on the other players in turn driving these letters.