In addition to what Bob does, I write the name/address of my pre-cruise hotel [I arrive a day before the cruise] on my luggage....tape it to my bag with clear "packing tape". If my luggage is mislaid, I want the airline to know where I am on any given day. I keep a second set of luggage tags which I put on my bags just prior to debarkation. Those, I put my home address on. I leave that information off the tags I put on prior to embarkation.
I don't want strangers to know I'm gone...what address I'm gone from. Also, if the bags are lost, I don't want them automatically sent to my house.