User blog:Maiorem/They're/There/Their

Okay, seriously, can't anybody tell the difference between "they're", "there" and "their" anymore? I've seen people use these three interchangeably and it's wrong. It's like the same kind of mistake people make with "you're" and "your". Why has so many people's English deteriorated so much?

Is it because people start to write/type words based on how they sound rather than use the correct form/spelling for each of these words?

Is it because people are watching too much television instead of reading, so they only hear the words but don't know how to spell the correct words?

Is it because people are becoming  lazy ?

Please, for your sake and mine, start using the correct form of each word. You will have to later in life anyway, when you work for a company and have to send a report; imagine your boss noticing that you have typed "I have submitted the documents to you're table," do you think he will be the least bit amused by such errors? No, he'll most likely start thinking of hiring someone else in your place.