hamlets are quick to farm, just dont camp at them and you will be fine most of the time. if someone start trying to hit you, then send a dozen single or dual archer sieges to the hams to waste their time.
you sit like sitting ducks because you sit at them. just hit and hit again. quick strikes :) and hamlets are best to farm like this when there isnt a tourny going on, that is if you are farming them to farm and not play for tourny reasons.
and when people play like that its hard to hit them, i play both sides of hamlets. farming and harmin.