I had to abide by the 120 characters to ask the question.
My thoughts are if we can document "others" that are in the census as being in the household but are not family members, I personally would like that. The other advantage would be to have "others" be a separate searchable list of individuals for researchers that cannot locate a person they are searching for within a context of one or more of their family members. If "others" was searchable, it may be easier for the researcher to locate individuals that had a pattern of being a boarder, a servant, or, otherwise transient, or less likely to be found living with thier family. I feel badly when I ignor one or two people due to not having familial relationship. If those activly documenting their families on wikitree can profile these individuals at the time they work on their bios then this will create a separate group that could also have subgroups. The group "others" could have subgroups such as boarder, servant, and whatever else may fit the intention. Does that make sense? Personally, I think it would be satisfying to be able to begin a profile for a person that is not related to the family but lives with them, and in the end to contribute to the documenting of their path in life.
1875 New York State Census: 7. Jane Quinlan (Servant, age 14)
I wonder about Jane, where she came from, and where she went. I wonder what researcher is looking for her. I'd like to help, and I'd like to see what others have reported about Jane.
1900 US Census:
a servant and a boarder (possibly son of servant):
11. Elizabeth Thompson (Servant, age 34)
12. Thomas Thompson (Boarder, age 9)
I wonder the same about Elizabeth and Thomas. I am guessing that Thomas is the son of Elizabeth.
I am less likely to research these individuals. If there was a specific category, and I could search within that category (others) then I would probably do so and enjoy it. I certainly would contribute to initiating a profile for these individuals, or locating a profile that exists already. I imagine there were many people that were transient and with a method to profile them I believe these individuals may be less mysterious and more loved by their researchers.