Over at Cross-Currents... Aaron White pens "TheThree Cardinal Sins of Singing".
With regard to Sin One - I agree with him about the song "Zochreini Na". In fact, I wrote about it in 2003 here. However, it is not Mordechai Ben David's song. It is Dov Shurin's. Credit/blame where it is due.
With regard to Sin Two... Mr. White judges people based on superficialities, ironic given his intended point about moving past superficialities in choosing music. One can be sitting in a hotel in the "lap of luxury", seemingly jovially, while still having serious personal issues on one's mind, whether health, financial, or faith based, any of which would well connect to those lyrics.
I think the underlying issue is not only, as the author notes, that singing is vertical rather than horizontal. I think it is also connected to the fact that so many are Jewishly illiterate, and even after years of Day school, cannot translate the words to many popular songs, and certainly can't identify the textual source. I can't even estimate how many times frum singers have asked for the source of lyrics to a new (or rediscovered) "in" song like "Mareh Cohen" (from the high point of the Yom Kippur musaf).