It's not so much that sexual behavior is inherently scandalous, the issue is with the broader context where a formalized hierarchy of power and a potential for intimidation are quite antithetical to any kind of genuine, consensual connection. The potential for borderline-abusive behavior in the workplace (not necessarily criminal, either) is orders of magnitude greater than any concern about "naming and shaming".

I think the author's (ex) friend believes the same about the hair salon thing. That there is a hierarchy of power and potential for intimidation in the context of a worker and a client. E.g. the guy at the restaurant being flirty with the waitress.