Agreed but a halter top and shorts isn't anyway to come into God's house.
Yes it is (as long as you are not gratuitously offending someone else). Why would you dress up to see your doctor for an X ray?
Read Genesis again. God put Adam and Eve into his house egg naked. He became angry when they broke a command and clothed themselves. I do not think that God cares how many or how few clothes you wear -- He knows what you look like naked.