Classically, satire is not about humor but a technique to bring about change. When Swift wrote A Modest Proposal he did not intend for his audience to laugh at the prospect of roasting and eating Irish babies. Swift intended to bring about change by making people feel very uncomfortable about what is really happening. That is exactly what this piece of satire is doing.
They had a satirical piece about the U.S. diplomatic efforts to exchange “Snooki” for convicted murderer Amanda Knox.
They were trying to be funny about Planned Parenthood and abortion. In my opinion, they failed.
With current technology, and websites like Urban Dictionary, redefining the meaning of words can occur at twitter speed. Good satire should contain elements of humor.