NinRick said:
Personal information also includes your astrology chart. Because it is literally a chart of your soul, someone who is somewhat knowledgeable and skilled can easily curse you really hard.
It is also important not to share Elements of your astrochart, because you can reconstruct the chart if you have enough information.
People have to be careful but it would be harder than you think to reconstruct an entire chart btw. Even a professional astrologer would have difficulty or not even be able to do that with just a few clues most people who talk about this on here give. I would assume most posts where someone gives too much information are not approved in my case that has happened a couple times and I have been much more careful.
However knowing and discussing someones element or even a few planetary placements or like I say my Ascendant. There is no way anyone can reconstruct a full chart with this. I never revealed even the year I was born.
If someone wants to be careful yet ask about something really specific they can say "I have a friend who has this or I know someone with such a placement" there is no way anyone would know.