Some Project Hoohahah ideas:
1) Hide GPS devices in loot-able goods.
2) Spray that crazy invisible UV paint on looters.
3) Get them assholes from News of the World to help hack the phones of all these kids and give all the data to Wikileaks.
4) Put a non-deadly, bowel-bothering virus in products and leave them out for nicking.
5) Spread rumours of idea 4 in all the stuff nicked from Poudland (http://i.minus.com/il1ddi.JPG), telling looters they need to goto hospital asap and round them up.
What ideas you got?