We concluded a few posts ago that if you trip/slash/hook/etc a guy on a breakaway with an empty net, then he would in fact be awarded and automatic goal. However EA is having difficulty programming this into the game, mostly with how the announcers/players on the ice would deal with it and celebrate. Also, there's no way in the NHL games to throw your stick/helmet/skate/children/etc at a puck or another player, unless that's an unannounced feature they added this year. So we only have to worry about tripping, hooking and slashing calls awarding penalty shots.
Personally I see the NHL rule contradicting itself, because it says in one part that the goalie would be allowed to return if a penalty shot is awarded with an empty net, but then other parts are saying it's an automatic goal. But I'm not a ref yet so I have time to figure the rule out... if I ever do...