You're not the only person -- I have a friend who did this, also generally inserting silly words in the side he guessed was scanned from a book. I have a hunch

You're not the only person -- I have a friend who did this, also generally inserting silly words in the side he guessed was scanned from a book. I have a hunch that von Ahn knew this would happen and the same scan is shown to multiple users before a word is chosen.