I agree-if people get their undies in a twist over something as stupid as this, they will get dropped from my list.
I would say that 90% of our cards some with pre-printed labels and no 'personal note". Who cares, I want to see how the kids have grown or read their letters to see what has gone on in their lives in the past year. I pre-print our names on the cards, pre-print the address AND return address on all the cards. Actually I don't use labels because they cost extra, I just print right to the envelope.