^^ this reminds me of an episode when my grandparents kept having their milk stolen, every second day they had two bottles delivered and after a while one bottle regularly started going missing, so my grandad got up extra early and waited for the delivery, low and behold 20 mins later some chav came and helped himself and proceeded to peel the lid and slurp it down as he walked down the street under the cover of darkness (it was winter), no doubt feeling smug. Now my grandad didnt intervene cos he had a plan, he took a couple of bottles of milk and kept it till it was nice and rancid then one morning after the milkman had been he quickly swapped the bottles then went and watched from the bedroom window, regular as clockwork the chav appeared, quickly grabbing the bottle and walking off. I can still hear the joy in my grandads voice as told us how the chav peeled the lid and took a swig, spat the chunks out then proceeded to violently throw up!
They never had their milk stolen again.