Plagiarism
Slate magazine picked up the story, but exercised responsible journalistic practice and credited Joshua Gross:
<a href="http://www.slate.com/blogs/moneybox/2012/05/15/taxi_button_tipping.html" rel="nofollow">http://www.slate.com/blogs/moneybox/2012/05/15/taxi_button_t...</a><p>And to think they did this without having to be told and without finding it necessary to insult the author--quite a contrast.