After the debacle of those Labour advertisements that were widely criticised for being anti-Semitic - a wonderful way of stealing their thunder in my view - anyone thinking that publishing online an ad you may feel to be controversial is a strategy to be considered with care. Brian Paddick allows visitors to his site, and invites his Facebook fans, to vote on whether he should focus his negative online advertising on criticising Labour and the failure to make Crossrail work successfully, or alternatively highlighting the number of times Boris Johnson has been sacked for lying across his career as a journalist and Shadow Minister. Actually visitors are then asked to donate to pay for the advertisements to be placed so it is voting with the wallet, an interesting idea though. You can, as a candidate, assess which advertisement is most relevant to supporters, has most resonance, and get them to pay for placing it. If you see a lot of either of these it could just be the result of his supporters wanting you to see it; if you see neither then perhaps it could be read as an indication that negativity isn't the best strategy.