The shopping mall has been a destination for American teens for decades.  It has become “Main Street” in many communities, and is a convenient place for teens to meet friends and hang out.  According to a new report from Scarborough Research, teen mall shoppers are still spending significant time and money at the mall: 68 percent spend two or more hours at the mall ont heir typical visit, and more than a quarter spend upwards of three hours.  More than half of teens (56%) spent $50 or more on their …