When an atheist monument was unveiled in an American courtroom Eric Hovind jumped onto it and proclaimed what he imagines is the truth of Jesus Christ. Later someone threw a toilet seat at the atheists which could have injured one of them.
If an atheist jumped onto a Christian monument as it was being dedicated or at any other time this would meet strong disapproval. In some nations even democratic nations like the UK, such an act by an atheist could lead to criminal prosecution for hate speech or for other public order offenses. This is yet another example where Christians try to impose moral standards onto atheists which they don't observe themselves.