Humans deal with text in a case sensitive way for a reason...it's a concise and effective way to add meaning to words. Why do I capitalize the beginning of a sentence, or suggest reading, The Case Sensitive World, which by capitalization alone tells you that that group of words must be the title of a book. How about SSN? or FBI or a million others. ssn and fbi, don't communicate as quickly because the otherwise capitalized versions immediately tell us "This might not be a word", and that's okay. Your brain recognizes case, therefore it is a concise way to communicate information, just as are color, font size, bold, underline, etc. We use case sensitivity everytime we communicate in writing and developing computer languages that way is nothing other than taking the best elements of written languages.