Language, please don't abuse it

I'm a stickler for getting things right. We all make mistakes, we're only human, but some things are not mistakes. They're ignorance. One of the most pervasive forms of ignorance, and one that really bothers me as a writer, is the incorrect use of language. The other day I was having a conversation with someone online. I won't go into details about who it was or the exact subject of the conversation, but they hit me with this line:

"Irregardless, I could care less."

I nearly had an aneurism. I ...