The people the Oruch Hashulchan is referring to like to allege thatthere is an ever increasing kitmniyot list.
A commenter made some type of claim, that it takes a Talmud Chochom to be matter something. Well it is clear to everyone that the complainers about the alleged expansion of the kitniyos list and who are averring that certain items, such as wild rice, corn and mustard are not part of the gezairakh of kitniyos are not remotely talmidei chachomim.