Three years ago, I used the space in this column to write about how restroom vandalism was spiraling out of control, costing portable sanitation providers thousands of dollars every year in replacement parts and worker hours to repair and clean up damaged units. By January 2007, it seemed like restroom vandalism was becoming a popular sport, especially among teens and college students, who brazenly posted videos of their destruction on the Web site, www.youtube.com. At that time, you could type the words “portable restroom,” “portable toilet’’ or “portapotty’’ in the search field at the Web site and see young people
