Here's a link to the tweet. Here's the article explaining why what most easily reads as a reference to diapers is actually supposed to say: "safe." Specifically: I am a safe person. Or even: I am a provider of safety. As one safety pin wearer said:
“My #SafetyPin shows I will protect those who feel in danger bc of gender, sexuality, race, disability, religion, etc.... You are safe with me.”Actually, if the point is to "protect those who feel in danger" — to deal with feelings as opposed to dangers — a symbol is good enough — but not if the symbol is misread. If a safety pin is to mean I am a baby or I miss punk rock, one might feel even more despondent.
If you go to that #SafetyPin hashtag, I think you might find most of the tweets making fun of it. Example: