Yep, seen plenty of those. Had to buy a SIM card for a relative and a certain provider lost my custom because their "accept terms" validate box didnt work on my mobile's screen size.I had the excellent experience the other day of a site signup page where the undismissable popup telling me I need to click to accept the site's T&C agreement hovered over the tick box to accept. Was some fun wrangling of stretching the window to a portrait aspect ratio to get around it.
UI is a process, Not a picture.