Hi David, As far as I am concerned all Obituaries, Marriage Notices, Births, et al, printed in the US or its territories are a prime example of the Fair Use Doctrine. Obituaries are placed for public notice for a specific time period, not for continued consumption through the ages...well, until we researchers found them useful decades later. So have at it.
The two simple rules of thumb are: (1) are you using a published item for financial gain and thus reducing the possible financial gain of the copyright holder and (2) is your use strictly used to inform or educate your readership. If you hit a no on (1) and a yes on (2), you're good to go.
Using printed copyrighted material is not a crime in the US, movies and music are a whole other ballgame. If using copyrighted material believing it falls under Fair Use, the only recourse is for the holder of the copyright, and only the said copyright holder, is to sue you in a Civil court of law. Usually a letter from a lawyer will ask you to cease and desist its continued usage. So you cease and desist and no more problem.