The difficulty of writing code to deliberately skew the dice rolls is staggering. I cannot imagine it being done deliberately. This leaves open the possibility that there is some unanticipated factor that skews the randomness of the rolls. This also I consider unlikely, although I don't know precisely what random or pseudo-random number generator is used here. The fact is that out of hundreds of players, there will always be a few who are currently experiencing what appear in isolation as purposefully distorted results. This is just the result of the normal operation of the laws of chance. However, because only those few notice and report the apparent discrepancy, the anecdotal evidence always supports conspiracy theories. And backgammon players are always paranoid!