This popular reference refers to the specific suicide method (Purple Kool-Aid)used by the 900+ participants of the People's Temple cult in the 1970s ran by Jim Jones.
There are so many bodies here! Where the f*** is Jim Jones and his Purple Kool-Aid?
Drinking the Purple Kool-Aid will cause a person to blindly follow those that gave it to them. This definition is considered to be a misinterpretation of the Purple Kool-Aid incident in 1970.
Finding any real examples would be hard, because really, this definition is a stretch. But a women being interviewed at a Tea Party rally in Washington D.C. attempted to suggest that non-conservatives are drinking Purple Kool-Aid and blindly following the government.
there are many speculations as to what purple kool-aid could be. for example it could be a concoction of LSD, tranquilizers and purple kool-aid. or it could be a street name for a hallucinagenic drug. or it could be as simple and innocent as standard purple kool-aid.