I know the FAQ clearly states that some TRAITS such as slayer, war dancer etc ARE NOT restrictions but PET is a restriction. I think in my campaign I will have all the career lablelled stuff (Pet, War Dancer, Slayer) all be restrictions. Otherwise, IMHO, it gets too confusing.
In fact, i argue this whole trait business wasn't thought out too well...sor far it all just seems too confusing...what are you guys going to do?