Although rules of etiquette and "netiquette" are much more relaxed in current times than in years past, it's still a good idea to limit cards with off-color or devilish humor to people you know very well.
Like the celebrity roasts, a graduation roast would involve people telling embarrassing stories about the graduate, although with fewer off-color jokes than are found in celebrity roasts.
And on April 23, 2007, she told some off-color jokes while emceeing the New York Women in Communications Matrix Awards luncheon, comments that stunned some of the audience.
The following sites either specialize in devilish humor in their e-cards, or have good collections of cards with off-color and naughty humor.
Not everyone will appreciate an off-color or vulgar gift, and the gift should be something they will find funny rather than embarrassing.