Toothpaste. Swallowing a little toothpaste while you are brushing your teeth is normal and nothing to, worry about. Eating toothpaste on the other hand is not a good thing as the Fluoride in it can cause an upset stomach. This is much more of an issue if you are talking about a small child eating a lot of toothpaste.
Not food. Won't hurt you, it's not toxic, but it isn't too smart. Toothpaste isn't food. Use exactly as directed on the label.
It's not a good . Habit to routinely swallow it, but if it's an isolated occurance there should be no problem. Hope this helps.
Not bad but . Not encouraged as excess flourid in paste can have potential harms.