I'm a Scrabble fan and regularly play Scrabble and Words With Friends on my iPhone. The former app follows the above rule correctly. The latter does not. Scrabble puts the *Play Word* button in the lower right corner where it's the easiest to hit. WWF puts the *Resign* button in that corner. Despite playing the game daily for months, I still consistently accidently hit Resign several times a week. There's a confirmation dialog, but that uses "Yes" as the default answer. I've actually had opponents accidentally resign on me during a game. Very frustrating, as there's no way to resume a resigned game. (WWF also buries the *Play* button in the center of the toolbar, right to next all sorts of similarly sized buttons, making it frightfully easy to hit the *Recall* button right next to it. I hit that *all* the time, which undoes my word and brings all my placed tiles back into my tray.) I have complained ceaselessly to the WWF authors to fix these simple problems, but their system still shows my bug reports as "waiting to be looked at by a human."