As much as I'd love to call conspiracy here I just dont see it. The most hyped lotto drawings of the last decade have gone to Cleveland (Lebron), Portland (Oden), New Orleans (Davis), Houston (Ming), Orlando (Howard). The biggest market in that group is Houston, and the rest comprise a "whose-who" of the smallest markets in the league. If the league is rigging it for those markets then their business model does not make sense.
Now, if you want to talk me into the league having some extremely shady officiating jobs in crucial playoff games... thats one I am willing to listen to. There are many games where either the officials are taking a blatant bias onto the court (which has been proven pretty soundly) and/or the league is flat out telling guys to extend marquee series on occasion. The only game in that I am utterly convinced was rigged was game 6 in 2002, Kings vs Lakers. The league should be ashamed of themselves and if it had been the Lakers getting screw instead of little ol Sacramento then the officials would probably still be locked in Stern's basement.