will depend on your setup. If you're using pedals with brake preasure cell then you can put a lot of preasure on them and most likely still move backwards.Replacing Castors with lockable ones could be useful for driving sim anyone done that?
Next level racing make stands with a small tray that flips out the bottm that you place the front 2 wheels in, it's pretty solid setup (but you still rotate a bit). Could always jerry rig it with some form of adjustable band around the center bit to something solid