Ethical Debate: Ghettoblasting in Public Confined Spaces

I do not consider myself to be a misanthrope, however, I definitely question that statement any time I try to study/read at most any local Starbucks.  

I realize that I am not choosing to read in a library.  I respect the fact that there are group confabs that meet in these particular settings and that Starbucks plays its handpicked musical selections.  

But what truly concerns me is when customers treat Starbucks as their own living room by ghettoblasting their own music preferences without headphones.  Why should we, mere minions, have to listen to your music?  What sets you apart from the rest of us?  Furthermore, I don't appreciate having to listen to your screamo music as it interferes with the music that is already being played. 

Not all ghettoblasters are intentional.  Sometimes I like to crank up the music in my car not realizing how affective the booming throbs may appear.  Sometimes those who wear headphones are not always conscious of how loud their music is.  However, there is no excuse for those who intentionally mark their public confined territory by pumping up their laptop stereo.  I do not classify you as cool and edgy but more so as a selfish narcissist.

I generally hate to confront strangers, so when these incidents occur, I usually leave my seat for another table on the opposite side of building.  Now is the time where I turn this ethical dilemma to you dear thoughtful readers.  What is the best call for action?  Should I confront said ghettoblasters or speak to the store managers?  Should corporations provide rules and regulations against blaring music being played by customers in their stores?