Would it be too verbose if we (very briefly) what actions to take if you don't want this? And/or (very briefly) explain why we do this?

I'm just thinking it might be even more confusing when I see this I might be even more confused because you didn't tell me what I can do about it.

At the very least, maybe we can say "Refer to the documentation of `ActionDispatch::Request#deep_munge` for details." And update that piece of documentation to include the details. Or perhaps put that in a guide.