When did it become acceptable for speakers of the English language to say "People that" instead of "People who?" I don't remember the rule, but I know that when you are referring to a person or people you should say who and when you are referring to a thing, an inanimate object, you say that. It has become so ingrained in our speech patterns that even I, abhoring it as I do, am guilty of saying it in spite of myself. It is the same with the word "like". When it first began to be used incorrectly, it was youngsters and teens who said it wrong and now it has pervaded into adult speech patterns. Another word that bothers me is "awesome". Some people cannot speak more than one sentence without using it multiple times. Buy yourselves a dictionary people! Expand your vocabulary!
Speaking of dictionaries, the one I keep by my computer is a hard-back issue of Webster's New Collegiate Dictionary, which I received in 1960, when I was a member of The Diamond Department Store College Board. I think I will have to buy a new one, since mr. kenju used a word today that is not in my old dictionary. The word is bloviate. Miriam-Webster online defines it thus: to speak or write in a verbose or windy manner.
Ha! Do you think he was trying to tell me something!?