the shoo-ing of harmful insects without killing as related by most buddhist nuns and monks is totally impractical and hypocritical.
say there's a dengue mozzie about to sting u. as a staunch buddhist, u shoo it away. mozzie by nature feed on blood and spread fatal disease. when u shoo off that mozzie, it may fly to the neighbour and feed on a helpless sleeping child. that poor kid could be infected by dengue fever and could die from it as a result.
who then is the killer - the mozzie or the one who instead of squashing it shoo it off? obviously, it's the one who shoo-ed it off and in return caused the death of the innocent kid. compassion to the mozzie and by karmic return bring harm to another person. is that compassion?
compassion should be practised with wisdom and not blind dummy compassion. something the buddhist fraternity should rectify and come their common sense.