While I agree with the general ideas of this thread and the misuse/abuse of the english language, I find it amusing to see people who dislike the incorrect use of words using words incorrectly themselves.
Despite what Merriam-Webster might say, irregardless is NOT a word!!
People who use this word generally mean regardless. However, adding the prefix "ir" means "not." But you also have a suffix meaning "not" that creates a double negative within the word itself. So, while they mean "not regarding information 'x'", they are saying "not not regarding..." or "regarding information information 'x'", which is precisely what they DO NOT mean!