I worked at DEC back when cdrom was just coming out (DEC had a server called 'infoserver' that would be a bank of cdrom drives you could mount and get data from; back in late 80's, early 90's).
we had requests from customers to OMIT the vol control and front TRS jack so that music could not easily be played using those drives. the customers were 'afraid' their worker bees might be enjoying their work-time too much by endulging in some music while they work. DEC saw dollar signs and said 'sure! we'll let you treat your workers like shit. no problem!'. sigh.
wonder who those customers were? we (engineering) were not told, just that it had to be removed from the product for 'some customers'.