what
don't think it'd be LAGGY but it wouldn't be the best solution
another solution is making a client sided file that disables zooming and then make it so you can only connect to the server with that addon, but none of them are very good solutions, they are the only ways I can think of doing it
Badspot made a script that prevented no zooming.
that was spaceguy, and then it got failed because badspot removed the function allowing you to disable zooming, which in turn broke spaceguy's addon