Theyre only Passive RFID. Nowt tinfoil... Just remember to mag to grid 'em if the Council suddenly start using posh bin wagons.
Once they start weighing bins and charging for excess amounts, that little chip will be all stood between you and a bill....
Or you could wait til they log who has what bin, then nick your neighbour's chip and put on your bin (remembering to keep yours safe out of the way)