Walk a Thin Line

[FuzzyPlum]

I do apologise if this has been discussed previously.

I really like Walk a Thin Line. Indeed, I think it's one of Lindsey's most under appreciated songs. I think I like the alternate version even more. However, I am frustrated by the bad diction.

'No one said nothin', I walk a thin line'

This is clearly a double negative and implies somebody or even everybody said something. Surely he should be saying 'nobody said anything'.
My question is; did Lindsey know this was bad grammar or not?
If the answer is no then I'm very disappointed in him- I thought he was brighter than that. If the answer is yes- it was artistic license then I'm even more disappointed in him as quite clearly it would end up irritating people everytime they sang along to it.