Car dollying my Porsche 944?

I have read that it is a bad idea to put the drive wheels on the ground when tow-dollying a rear wheel drive vehicle. However my Porsche 944 is a 5 speed with a rear trans-axle. When placed in neutral the 944's drive shaft does not turn, which seems to be the major concern when towing other rear wheel drive cars. Anyone out there have experience with this?