a) what happens if there is change that hasn't been encountered yet so it's not in .agentnotallowed? b) is there a guarantee that something described in these f

a) what happens if there is change that hasn't been encountered yet so it's not in .agentnotallowed? b) is there a guarantee that something described in these files won't be touched? I've seen examples when agents directly violate these rules, profusely apologising after they get caught on it.