Oh yes, i do speak in very broad terms AL - for example, using batons on a tax-evading granny is too much. I do agree that force should be appropriate - but i also think appropriate oughta be taken in terms of the situation, not viewed cooly in a courtroom.
A recent example from here (well sydney, but close enough to here) is that 2 men entered a home of an older gentleman one night. they were armed with knives, he took a baseball bat and knocked one cold, the other ran. He was charged with GBH and criticised for using unreasonable force, because "there was no way he coulda known they were armed".