I actually did that with my Mo2's, and here's why.
Mounting a ski backwards makes it pretty much useless, riding forward feels very unstable, and its extremely easy to catch an edge carving switch.
Mounting a ski forward make carving switch easier, makes nose grabs and tail grabs easier, and you dont sacrifice forward riding. Once you mount forward of the recommended mark, you have already messed up the sidecut, so why not go all the way and make it worth your time?
With my most sincere regards,
Golden Wheelchair Nominee- September 21-28