By ajsmith@thekmgroup.co.uk (Alan Smith) Twelve fines have been issued to motorists as police step up their crackdown on boy racers in a Kent town. Officers carried out road checks and monitored the speeds of vehicles in Dartford last night following complaints that the Crossway Boulevard in Greenhithe was being turned into a regular weekend race track. A public space protection order had been issued by the borough council, as authority chiefs looked to hand detectives wide-ranging powers to issue on-the-spot fines to motorists suspected of taking part in “car meets”. Police flooded the area o…