SharonG,

Here is a trick you can use so this does not happen again:

After you write your reply, look for the button. Highlight any text in your reply that you think might be a spoiler. Then Press the button to change the color of your highlighted text to the same color (light yellow) of the background. That way it is invisible. At the bottom of your reply, tell people there is hidden text and for them to view the text they should highlight it.

Here is an example of some text that is highlighted:

To be or not to be that is the question.

To view the above text, highlight it with your mouse!

It is easy to do! Try it!