there are a lot of things that one might should get offended about, but the affirmative bake sale at berkeley isn't one of them. it didn't employ any racist slurs, and in terms of actual baked goods it discriminated most against white men. so, is your view that the college republicans can't express opposition to affirmative action? or that they can't express their opposition satirically or with an analogy? or perhaps the view is that they shouldn't be able to express their opposition so cleverly, or so humorously, or so effectively. i'd suggest instead trying to show why the bake sale isn't a good analogy for college admissions. so far i don't hear people doing that, just creating a hostile-learning-environment style argument for the repression of satire.
there's been a lot of stuff like this: Joey Freeman, vice president of External Affairs of the Associated Students of the University of California, said, "It really was deeply hurtful to lots of members of our college community." of course, hurting people is wrong. selling them cupcakes, however, appears to do little actual harm, though i admit a person might be hurt by almost anything at a bad moment. regard it instead as perfectly protected political discourse, and respond to it.