Defamation. Freedom of speech. Honesty and transparency versus lies and coverups. These and other gray matters are all in play in a $750,000 lawsuit filed by a Virginia contractor against a former customer who left a scathing review on review sites Yelp and Angie’s List. If it gets settled in court, the ramifications will be felt by both the review industry as well as millions of small businesses around the country. If Christopher Dietz, owner of Dietz Development LLC, wins the lawsuit, many consumers will become fearful of posting reviews that call out businesses. If Jane Perez, the woman who…