Don't expect consistency any time soon ... the FAA has one set of rules, each airline can adopt its own, and all 50 states are free to add still more.
When the FAA published its list of banned items a week or two ago, I thought that would streamline everything. The next day I learn that the state troopers in Connecticut have ordered security to pull additional items out of carry-on luggage ... the state police acknowledged in the press that the FAA didn't ban those items, but said "We're taking it a step further."
And of course, my ATL-BDL flight Sunday featured SkyDeli with ..... a plastic knife.
Oh well.