The question here seems to be if an addition is invented that can't be circumvented by our normal lab techniques. It is mentioned already since 1998 in these forums, and it seems to me that it's not a hoax, i've once seen it myself, all goes perfectly well untill the end, then your crystals melt in 5 minutes exposed to the air, or you don't get them at all.
Simplest solution: buy from non US sources, it is definitely contained to the US suppliers only, ...yet. LT/
WISDOMwillWIN