[Avodah] What's special about shevet Shimon?

[cantorwolberg at cox.net]

In Bamidbar, we get the count of all the tribes. The language for all 12 is 
identical: "tolodosam, l'mishpchosam, l'vays avosam b'mispar..." except for 
Shimon: " "tolodosam, l'mishpchosam, l'vays avosam PECUDAYV b'mispar..." (1:22) 
What's special about Shimon? 

The tribe of Shimon was the only tribe according to Rashi that did not receive a curse.
Hence, Pecudav (ITS numbers) did not receive a curse.  [That was what was special
about Shimon].