I saw something about a friend on Facebook and mentioned it to them the next time I saw them. They seemed offended said something about how did I know their personal business.
Queenie, did I do something rude?—Online Etty Ket
Dear Etty Ket,
No. When you put things on Facebook they are there for everyone to see unless you set the controls to limit who can see it. If you do not do so, it is silly to be offended when someone sees it and comments on it.
All the same, the best thing you could have done would have been to apologise for offending them and change the subject or move away.