2022 June 10, Ben Goggin, “Wickr, Amazon’s encrypted chat app, has a child sex abuse problem — and little is being done to stop it”, inNBC News[1]:
One user appeared to be selling child sexual abuse material, writing "Sixteen is a cool number" and "Sells to anyone" alongside a Wickr handle and the acronyms "map" and "aam," which stand for minor-attracted-person and adult-attracted-minor respectively.