[DiDok]

IMHO the pause menu should break all the keyboard input into the engine and let the game sort it like it was normal situation (vehicle slows down gradually etc.), still sending the client data to server, but I think with default pause behaviour it's kinda impossible (eg. the retarded mod has its own menu/map/options instead of default pause)
It would be much better than the previous solution that made vehicles stop at once, causing grief (like ability to evade pursuit by pausing before cliff wasn't enough...) and being totally unrealistic