This must have been a peaceful resignation because who else would spend the time and money to make this little goodie bag? Something tells me that this employee was all about puns and jokes... Maybe it's for the best that they moved on from this career.
Who's the Loser?
If you treated the person who was in charge of the sign wrong, you should probably expect something like this. Also, who was the loser in that situation? Were they hiring losers or were the managers the losers because they had someone quit? This story must go deeper than what's on the sign...