Getting dispatchers to respond to requests for re-release (or re-dispatch) during breakfast was/is difficult; imagine diverting because someone was eating labna & dates instead of listening to the HF in a dispatch office!
Also, I've heard of requests for landing clearance going unheeded because tower personnel were breaking fast; tower 'unmanned' up to 25 minutes (gotta keep their priorities straight!).
Could go on and on!