There have been 2 reasons I've been speaking against BOVs for the past few years.
1. Many have issues with leaking boost.
2. Loud BOVs are gaudy. People who have them (IE TXS RFLs, Greddy RS) are just after attention. Unfortunately they don't real that it's NEGATIVE attention that they are getting. While they think they are cool, everyone is rolling their eyes at them knowing they are just another ricer.