What is the policy about spoilers here? [duplicate]

Question

I recently asked my first question here. In my first version, I used a spoiler block to hide most of the text. Soon after, a mod passed by and edited the spoiler block away, leaving all the text visible.

Later, I got downvoted for "spoilers", but it is not given if spoilers in the title or in the body. After I posted my comment, explaining to the user why I thought I did not spoil anything in the title, and that the body got edited, I have received no further explanation.

Today I then notice a few questions were spoiler blocks are extensively used and/or added at the request of other users.

Can someone help me understand what is the policy here about spoiler blocks? When/how should they be used?

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Note: I don't want anyone to pile on the downvoter or the mod, I understand why the downvoter behaved that way (even if it appears to be against community consensus), and I understand that the mod wanted to help me with my first question. I am here to ask you about site policies, not to crusade against this or that user.

Answer 1

The current consensus is that spoilers should not be in titles only.

I'm not aware of any specific consensus about spoilers in question text unless the bulk of the question becomes unreadable because it mostly consists of spoilers.

See?

I suspect that this is the reason the mod removed the spoilers. One could argue that the mod could have made a more elaborate job of it but, as I said, the current guidelies/consensus is regarding titles only.

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Later, I got downvoted for "spoilers",

You might assume that but unless the voter gave a reason in comments, you don't know that.