Yes some hacks like map hack can be turned off quickly with a hotkey, however some map hacks leave the mine icons on the mini map even after being turned off.
Also, SS is always a valid way to prove build hack - if you have magic and no castle then there is no way to hide that from a SS.
Other than SS and 'unknown' warning from anti-hack bot we have nothing ... its not perfect but its something
What about framing people? I can join a game and toggle on and off any cheat for a player. Making this antihack worthless LOL