Garrison, what are you thinking? As a lover of the English language, surely, of all people, you should recognize a parody when you see it. For those who are especially dull-witted, there was even a disclaimer under the shirt that read:

WARNING: This shirt is not associated in any way with Prairie Home Companion, Garrison Keillor, MPR, The Fitzgerald, or, well, anything — it is PARODY.

–Jane, not associated with anything having to do with anything and therefore is responsible for nothing