Spoiler Tags

[MLE]

I think there should be an expandable tag that you click it and it automatically opens up and puts in the rest of the text. Like:

This is what the tag would look like:
SPOILER whatever the person wants to describe the spoiler as (public knowledge stuff)

And then click it and it changes to:
SPOILER
text text text
text text text
text text text
text text text
text text text
text text text
text text text
text text text
SPOILER