Improper usage may include making it a double plural. IE: Pixs. Pictures's pictures?
Ana(sms): I should have seen the what?
Gregory(sms): The pix dumbass.
Ana(sms): Only high school girls use that word slut.
Girl 1: OmFg!1! L00k @ thos PiXs I jus' Twited.
Girl 2: AwEsOmE!11!!!!1