https://thesocietypages.org/socimages/2016/11/30/weighing-the-symbolic-value-of-the-safety-pin/

"Symbols have to be collective to have any meaning at all, and that is why they tend to have a fad-like character and are typically promulgated and distributed by organizations. That is also why people may contest the meaning of symbols. They are superficial and elusive conveyors of meaning. There are no clear guidelines about when to display symbols and how they will be interpreted. But the use of symbols to convey one’s identity and stance with respect to important issues is an important part of how people come to perceive the opinions of those around them. And that is important."