No medieval city or town existed without one or more dedicated Town Criers. You’d probably have towns without a herbalist, but never one without a town crier. This is the reason why the villagers in Farthest Frontier moronicaly run towards the raiders rather than away from them.
My idea is simple, the town centre should appoint dedicated “Town Criers” whose role is to run around town and warn people of incoming attacks the second the bell is rung, so that people run and hide and not run towards the raiders forcing me to pause the game and move them around manually, breaking my immersion.