Columbus-based NetJets, the world’s largest private-jet operator, is asking a federal judge in Columbus to dismiss a lawsuit by its pilots’ union. The suit, filed in late 2014 and amended this month, alleges that the company interfered with union activities during contract negotiations by hacking into a message board for unionized employees and by impersonating and pressuring employees on Twitter, among other things.adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-BUSINESS","nativepaywallcategory" : "NATIVE_PREM-BUSINESS"};