I was going to say the same. Surely people have been crossing things out in writing and art for a very long time. Edit: According to etymonline.com, crossing t

I was going to say the same. Surely people have been crossing things out in writing and art for a very long time. Edit: According to etymonline.com, crossing things out dates to at lease mid 15th century: http://www.etymonline.com/index.php?search=Cross http://www.etymonline.com/index.php?search=Cross