An advertising company's attempt to start a £30,000 campaign against the BNP backfired when it infected hundreds of businesses with an email virus. Stoke-based agency Ad One sent out an email on Monday to the companies, asking them to support a multi-media campaign against the BNP's Stoke-on-Trent mayoral candidate, city councillor Steve Batkin.   158308&amp;contentPK=12069498 (.:.BNP.:. spits out his drink) HAHAHAHAHAHAHAH :rofl :rofl :rofl HAHAHAHAHAHAH :rofl :rofl