Banyan would have had no way to tell that his symbol would be garbled at UK end.
From the economist.com
Not surprisingly, this message has been completely garbled by the press reports.
From the guardian.co.uk
On some occasions, the doctors do not speak clearly, or voice files are garbled.
From the en.wikipedia.org
Why should anyone believe your garbled arguments for male scientific dominance?
From the newscientist.com
Double-check the facts, which may have been garbled by the time you received them.
From the kansas.com
I put it through Google Translate but, unsurprisingly, the translation is garbled.
From the en.wikipedia.org
Some, like you, however, are more sensitive to the garbled information than others.
From the stltoday.com
The army provided a list of passengers, but the names appeared to be garbled.
From the edition.cnn.com
Based on a garbled mayday call, searchers began looking off Ontario's Turkey Point.
From the dispatch.com
More examples
Falsify: make false by mutilation or addition; as of a message or story
(garbled) confused: lacking orderly continuity; "a confused set of instructions"; "a confused dream about the end of the world"; "disconnected fragments of a story"; "scattered thoughts"
To sift or bolt, to separate the fine or valuable parts of from the coarse and useless parts, or from dross or dirt; as, to garble spices; To pick out such parts of as may serve a purpose; to mutilate; to pervert; as, to garble a quotation; to garble an account; To make false by mutilation or ...
(garbled) difficult to understand because it has been distorted; scrambled
(Garbled) Garbling was the (illegal) practice of mixing cargo with garbage.
(garbled) The modification of a cryptographic key in which one or more of its elements (e.g., bit, digit, character) has been changed or destroyed. [800-130] (see also cryptographic, destruction, key)
[JP 1-02] (DoD) An error in transmission, reception, encryption, or decryption that changes the text of a message or any portion thereof in such a manner that it is incorrect or undecryptable.
(v): to distort in such a way as to make unintelligible