Marlboro Marijuana?

I heard that when marijuana first came legal for medical reasons, RJ Reynolds and other cigarette companies bought up a whole lot of land for future crops when it becomes 100% legal (or so everybody thought it would sooner or later). Along with this, that they also had plans to put a little bit of the stuff into cigarettes now so that they are subconsiously getting us used to it for when the time comes they hit the market. Anybody hear of this or should I stay away from those darn conspiracy theory websites?
-Morgan