Although, I don't understand why a band, singer, or singing group would waste time trying to make a sublimal message by reversing the song.

So I say, it's just coincidence.
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They could just do it to get people to talk about the song, publicity, and people to post it all over the net, so it becomes more well known, and people would buy the song, etc. Even when the messages are far-fetched, it causes lots of discussion. Worked for Led Zeppelin's song Stairway to Heaven, with that satanic message supposedly in it. It may not of been intentional, who knows, but one thing is certain, that it has caused lots and lots of people world-wide to know the song and it's message.

I think it was Pink Floyd who put a secret message in one of their songs, and it wasn't far fetched, it was one of the guy's saying a proper message to whoever finds the secret message to send it to them, telling them that they found it.