I saw this sign on a bus in Argentina and had never seen it before. The bus industry in Argentina had a campaign to train drivers to recognize signs of human trafficking a number of years ago. I learned also there are companies and businesses doing this around the world within the transit industry. This made a lot of sense to me since I only otherwise see help available with postings, such as this one:

Whatever we can do, must be done! Signs, of all sorts, indicating help is available are important!