I recall a thread a while ago, maybe a year, where the subject of reading for an extra-marital affair was discussed. Opinions were rather polarized, as was to be expected. I was actually surprised at how many people wouldn't read about that because it was immoral. Now, puritanical concerns aside I think that in many cases a good Tarot reader puts aside their own values for the benefit of the querent.
Although this thread is not strictly about ethics (there are more than enough that are, though), I think that even in the relative "safety" of the exchanges one can at least try to remember that a Tarot reading is for the person receiving it and they may have any number of issues and worries that may not completely gel with our own lifestyles but and nevertheless quite valid. Sometimes this may mean doing third-party readings, for example, or other things that are looked down on. Just as we try to be neutral when interpreting the cards, a sense of empathy and understanding is just as vital when fielding questions. The exchanges here on AT are very good schools for this.