Being a new cacher, I can think of another reason one might want to do something like this. We have decided, at the moment, to have just one geocaching account with the premium membership. Once our kids are of an appropriate age, we will let them decide if they want to have their own accounts for use on into adulthood, but for now we thought it would be easier to log things just once. However, I travel quite a bit in my work and there are certainly going to be times when I will visit caches that the rest of the family won't have a chance to see. We are considering purchasing four travel bugs or geocoins as personal items that we would each have visit a cache that we actually see. That way, each of us can kind of see which caches our personal bugs have visited separate and apart from what we log with our family account. Also, the kids will be able to go back and log their personal visits to their personal accounts (or revisit them) if they ever decide to have them using the TBs as a reference.