Which in more confusing, a double negative or a double entendre?

Question

Double negative is famously used in the first two lines of the song "Another Brick in the Wall (part II)" included in the album The Wall by Pink Floyd, sung by schoolchildren

We don't need no education.
We don't need no thought control.

example of a double entendre:

"My name is Ozymandias, king of kings:
Look on my works, ye mighty, and despair!"

King Ozymandias' intended meaning was that nobody could hope to equal his achievements, but time and neglect have rendered another meaning — that the mighty are mortal will inevitably share his fate of oblivion in the sands of time.

Answer 1

I think we are so used to the terrible grammar of the double negative that they are very easily understood.

The double entendre is obviously more difficult and obscure in the situation you quoted. But in usual societal use, it is often much more brazen and obvious than that. Usually, it is risque, which makes it (supposedly) amusing and that much easier understood. Check any good British comedy program for some FINE examples!!

Answer 2

Why anyone could use either.
Double negative.