It could indeed, but when Sainsbury's started doing those 'microban' plastic with antibacterial impregnation chopping boards, they found that wooden chopping boards actually have better natural antibacterial properties than those you could design in to plastic implements.
You could use only well polished highgrade stainless sppons, and autoclave them, but some gut flora is good for you. Manky chopping boards are cheaper than Danone yogurts too.