This is completely bogus. These kinds of messages get sent over the internet all the time. Indeed, someone who really had this job is more likely to describe herself as a dispatcher. If this were a real phenomenon, there it would be real news, and real news organizations and real police departments would be reporting it. The formula is less about chemistry and more about enhancing fear.
Strychnine is a poison.
LSD is irrelevant to its toxicity. LSD won't change the ability of strychnine to be absorbed by the skin. LSD won't increase the lethality of strychnine. The amount of strychnine needed to hurt you would be visible on phone keys, if the material could stay attached to it. It is bogus as a claim about gang initiation.