i guess it still boils down to someone from autodesk having to check your working ma and mb files...

that involves sending agents out to do their checking, but that would take effort and lots of money... probably more than the criminals are worth...

i would have thought maybe there is a slight difference in the output picture files

you can encode secret messages into them you know...? and the best part is, is that people can't tell the difference between a non encoded picture and an encoded picture...