This NSFW video will break your heart.  Middle school students in Rochester, New York viciously taunt school bus monitor Karen Klein with profanity until she cries.  A student posted the video on his Facebook page and a concerned third party posted it on YouTube to show the abuse Karen went through. 

The story has a happy ending, though.  25 year old Max Siderov from Toronto saw the video and was horrified.  He set up a fundraising page to raise $5,000 to send Karen on vacation.  The fund has grown to over $300,000!  Happy retirement Karen!