It annoys me very much. I design adverts on a regular basis, and get so fed up with clients filling the entire tiny advert with an essay of unreadable text, most of which doesn't make sense, and repeats itself. Even more annoying when you design a nice clean concise eye drawing advert...for them to change it into a crappy word file effort with word art (just slightly off centre when it's meant to be centred) and an essay.