This thread got me thinking:
http://www.jehovahs-witness.com/6/98014/reply.ashx
Would it be wrong for a Christian to use wind chimes in his or her home?
My theory about these stupid "questions from readers" articles is there is rarely or never an actual question submitted by a reader. Rather, these are probably "questions" made up by the WT writing staff so they can discuss a topic they feel like discussing.
My theory about the writings of this and that being "conscience matters" is to intentionally suggest that there could be something wrong with whatever is being discussed. For example, if nothing had ever been mentioned in the literature about wind chimes, few or no JWs would ever remove them from their homes because they'd think there was no reason to. Suggesting it's a "conscience matter" gives the individual JW the idea there is something wrong with it and also gives them the opportunity to raise themselves in the KH pecking order by being one who goes to the max to be "righteous".