This is similiar to the modified exhaust statute. Only the most obnoxious violations get my attention. If it's the thump thump bass boom that shakes cars around them I write the cite. There is no breaks in that regard. I get so tired of hearing it in my home that if I catch one while I'm on duty they get the $73.50 cite to remember not to do it again.
(As a matter of fact I just heard one go by my house while I was typing this......
)