First, one of my own, which seems to have escaped from another thread.

Bill Shatner wrote all of "Tek War",
So he claims, though I'm not too sure.
Reviews I've seen posted
Suggest it was 'ghosted',
But watch out for that damned libel law!

And, for the cognoscenti

There was a young curate of Salisbury
Whose manners were quite halisbury scalisbury.
He rode around Hampshire
Without any pampshire
'Til the Bishop insisted he walisbury!

(some knowledge of English pronunciation/ alternate placenames required!)