tbh right, schmight, you just need to do what's best and easiest and most enjoyable for you and the family.
i never worried a great deal about salt, insofar as i don't cook with it myself and therefore it was bread and cheese etc that i more kept an eye on. sometimes i did find myself either rinsing or sooking sauces off bits and pieces though. cools it down, removes a bit of salt, it's all good.
If you don't normally add salt, don't do lots of prepacked food, then the odd bit of gravy or sauce won't do any harm at all. I sucked off some sauce, but that was more in a mess reduction effort than anything. I am scummy mummy, and apart from not using salt (and prising the soy sauce from him), I never worried about it - on the general principle that I wanted DS to enjoy a wide variety of food, and not letting him eat what we did was going to put up 'child' and 'adult' food boundaries.
You can do either with wheetabix - they can just stick their hands in it wet and suck it off, or gnaw it dry. We tended to do shreddies or mini shredded wheat with milk as they are less messy