New York City residents finally are digging out of a devastating post-Christmas blizzard, aided by unexpectedly warmer weather. But a growing number are sounding as if they want to use their shovels against union snowplow workers and their supervisors. Various news outlets have reported that leaders of the Service Employees-affiliated Sanitation Officers Association ordered their Teamsters-affiliated work crews to slack off as a protest against recent City Department of Sanitation budget cuts and demotions. The apparent work slowdown not only paralyzed traffic, but also led to two deaths, and more indirectly, to the trapping of numerous subway commuters...