The inequality in salaries between men and women is probably the worst hidden secret ever. While employers try to deny this, it's well-known that women don't get paid as much as men. This is why a foul-mouthed chatbot has been created -- to help ease this frustration.
Search for 'Ask Cindy Gallop' and start a chat with the bot. Though it's not well-developed and tends to repeat answers, it makes a valid point -- there is inequality and women shouldn't take it lying down. Check out this Mashable article for details.