I have not seen evidence of “flat out lies.” I think it is more complicated than that.
I think it looks presently more like a matter of the principals at Mobile Fidelity making statements which may be technically true but which they know are highly likely to be misinterpreted by the audiophile community.
"MFSL engineers begin with the original master tapes and meticulously cut a set of lacquers."
While this statement is technically not a flat out lie, it strongly implies the lacquers are cut from the original tapes but we now seem to know they are not. Lie vs omission of critical information in the description of their process ... splitting hairs.