Nobody has said yet what exactly is wrong with redundancy. It seems useful to me. Sometimes its inflectional concord between words (which is a requirement of some languages and its absence would signal a grammatical error); sometimes it's for rhetorical effect (and we're all for that where and when appropriate); sometimes it's to avoid ambiguity (which seems a good thing, too); and sometimes it's something which annoys a select group of speakers (who usually seem wrong about other aspects of language, so I'd say it's something to do with them and not the language)..
What is wrong with it, besides lack of dignity, is that it escalates, driving the world closer to
Fahrenheit 451 and
1984. Babblers so enamored of their own voices that they cannot be bothered to recall what acronyms mean perpetuate these things and even try to justify it with "all the other 'tards say it that way". One of the most intelligent characters in television was made to sound like a total dolt by saying "OCD disorder". And yes, at least one viewer noticed. It is time to declare Pleonasm Jihad!
