There are legal criteria as to what constitutes defamation and
what constitutes acceptable defences. If you want to learn how to
defame someone, just watch CSJ.
If someone makes comments about you that are clearly false (and you
have evidence to that effect) and those comments are designed to
denigrate your character or standing in the eyes of those who have
seen or heard those comments, then you have a case. Remember, if
you take someone to court for defamation, you have the burden of
proof. You've got to show evidence that the other party is in the
wrong.
Posting a photo of someone jumping queue, smoking in a non-smoking
area, or eating in the MRT train...that's all perfectly legal. If
you add a comment, then you are making an interpretation of the
photo...be careful that what you say is true, something CSJ has
never learned.
