Ford put a time box around his Pardon to cover Watergate. Obama could follow that Pardon like it was a Form Letter. Handy for the future!
Handy, no doubt. Where do blanket pardons end though? Say an anarchist gets elected (anything is possible these days). Can he pardon all people for all crimes committed between 1850AD and 10,000AD? Ridiculous example, I know, but blanket pardons are ridiculous in a just society. But, as they say, c’est la vie.