I learned having speech recognition on can fuck up your ability to type shit. 
I just got an image in my head of Autocowrong, and Speech Recognition fighting it out.
Of course, an old one was people Texting. While driving, but so they don't get pulled for not using hands-free devices (Or in a wreck) they talk to their phones, to type in a text, for the person on the other end to have read out to them in Siri's voice...
On phones. I'm serious, I've seen this happen. Somebody talking to their phone, and reading the text back to them, while they're driving. Okay, but it's a Telephone! I mean, even before we came up with Smart Phones, you remember when people used the old analog (Cellular) system to talk to each other. Vocally?
Now, we talk to our phones, to text each other, and pick apart the grammar mistakes auto-generated by our aps. I have to wonder who's smarter, the phones, or the people using them? At what point do our phones become self aware, and just start fucking with us out of boredom?