as letsgohope said this would put a strain on the servers and cause large amounts of lag for all players, although this won't be a problem for small alliances who only get small amounts of calls. in my alliance the lag is bad enough when majors are posted but with this on top of it would make the game unplayable. plus there is no reason to share ALL of your missions unless you have no stations, as everyone can deal with one pump fires, one police car incidents or medical emergencies depending on what station you start out on
Like I said an option in the dispatch center that would allow the option but have like a disclaimer that you cannot use it in large alliances? Or like a scan that would figure out the amount of members in the alliance and decide if it would be a good option to have on or not?