Lady Green, in a short post, recently helped me clarify my own feelings. I am adopting her point of view. People walking by may know what is inside, but they are not being non-consentually exposed to all the pictures and toys. I cannot dictate what you should do. This is just a list of the many things I have seen, collected, and requested from the net and other sources.
Some suggestions are clearly for male subs.
Others for female subs. Some will work for both. There are probably places we would be put in jail if we tried these things. There is also some concern about involving others in some of the scenes. Several suggested making arrangements ahead of time with the clerk or store.