This subject has come up several times in the Pax/SLF forum, usually with similar results to those seen here.
The simple truth is that every flight contains a large group of humans who, true to their genetic make-up, are individuals, with varying perceptions of what is important based on their life experience up to that point. Any action on the PA, which is by definition an instrument for mass communication will result in some individuals feeling that it is inappropriate - too little or too much. Finding a balance that meets the needs of everybody is virtually impossible, although extremes at either end, as discussed in this thread, will nearly always upset most people.