Related to Can you fold a tallis on Shabbos?
Folding one’s tallis after Shabbos is a seguloh for Sholom Bayis (unfolding a dish towel and helping one’s wife after Shabbos is a bigger seguloh according to Rabbi Zev Greenglas of Montreal, alav hashalom).
If I find my neighbour’s tallis in Shul unfolded (say on Sunday afternoon or later in the week) is there anything wrong in my folding it for him?
Am I interfering with his Sholom Bayis
or
Would his wife be pleased if she knew that his tallis which she may have bought for him had been folded (even by someone else)?