Instead of being a witch hunt, you can just contact the girl/shop personally as that is what you should be doing ANYWAYS if you have a known STI. It is called contact tracking, and should be done as far back as 3 months. There is even a website to let your partners know anonymously incase there is any embarrassment issues.

Most WLs and shop owners take these accusations and their health very seriously, obviously being bad for business. It doesn't affect the "whole industry", as if it's going to stop you from punting. As long as you do contact tracing, it will be dealt with accordingly, especially if it is a WL.