So, Mr. Ed was actually passing secret messages to t*rr*r cells?
Since a pun is mandatory in this thread,
"Stable owners said they shouldn't be saddled with this burden, and trotted out a recent Gallop poll as a canter-argument. "This would be a great mis-'carriage' of justice", said one, "and will only spur businesses to use other means of transport".
A TSA spokesperson, taking the bit in his mouth, responded that regardless of the cost or inconvenience, "The rein of terror must end."
(Yes, I can run like this as long as a horse can run. Will mercifully stop here before being shoe'd away.)
Idea for next song parody: "Hoof, The Tragic, Drag in". But you can't trust horses anyway, as per this one: