I made this point many years ago in the context of Watchtower lapel pins. It was a fad some 15 years ago in my area. One of those Witness field service supply companies was selling them.
One long-time MS took it upon himself to buy a pile and distribute them only amonng elders and COs. There was a crowd gathered at the hall patting themselves on the back about it and I bluntly asked them what he difference was between those lapel pins and a wearing a necklace with a cross. One of them got red in the face he was so angry at me, but he held it back.