What ever happend to a little detail I like to call: Due process
Record the noise violation, press charges, use the law to seize the offender's vehicle. Simply giving the cops indiscrimate permission to seize vehicles for 'loud' music is ambiguous at best.
"Nice Lexus, lady ... I bet you could really crank those speakers if you wanted too..... nah, don't bother showing me, it's my car now".
Power corrupts, absolute power corrupts absolutely.
IMHO, this is not aimed at tax paying citizens, but gangbangers who bring down the quality of life with their "thumpin sounds".