[dandelany]

Sorry, but you're just wrong - not "I disagree with you" - but your facts are wrong. There are many rules, as other posters have said, and people who speak AAVE regularly would absolutely be able to pick out grammatical errors. If I said "I didn't tell him anything about anybody," it would be grammatically correct English. If I said "I ain't tell him nothing about nobody," it would be gramatically correct AAVE. If I said "I ain't tell him nothing about anybody," or "I ain't tell him anything about nobody," AAVE speakers would certainly recognize it as incorrect. Most AAVE speakers I know would probably make fun of you for mixing dialects.

Your four examples of valid AAVE prove absolutely nothing. Most statements in English can be formed correctly in many different ways without drastically changing meaning. Here are the English corollaries to your AAVE examples:

I didn't tell anybody anything about any sushi. I didn't tell anyone a thing about any sushi. I didn't tell anyone about any sushi. I didn't tell anybody about sushi.