Continuing the thought of sources in genealogical programs, I want to air one of my genealogical pet peeves. What you do in the privacy of your own computer is your own business. However, when you upload the contents on to the Internet, please know that there is a huge difference between a footnote and what I call a provenance note.
A footnote is source citation that enables a researcher to find that information on their own. It may be to a book or article or best of all, to a primary source such as a vital record, church record, deed, probate, etc. In any case, it is to something that I can then look up on my own. It also tells me that this is a bona fide family or person.
A provenance note is that terrible source note that says the information came from a person or database such as World Family Tree or Ancestral File. The worst thing about genealogies on the Internet is finding a person or family and then trying to see where the information comes from. Then the answer is: "GEDCOM file from John Smith, Jan. 1 1999." Ugh. That's not a footnote! That's just where you got the information. It doesn't tell me whether the information is reliable or not. So thanks for sharing, but I have to do the research on my own anyway.
So what you do on your own time--that's your business. What you post on the Internet becomes everyone's business. Do us all a favor and give good sources.