Autocomplete

So... autocomplete.

It's interesting, because it's what humans do all the time when they're listening to conversations.  We've taken a human cognitive model and extrapolated it to search engines, word processing, and basically anything that involves a computer receiving our input.

But shouldn't we also extrapolate the fact that it's really rude to persistently jump in at somebody's throat to finish their sentences, guess what they mean to say without giving them your full attention, to repeatedly feed somebody words that they weren't looking for?  It's frickin annoying in real life, so why on Earth does anybody think it's a good idea for google to put in extra words into my search the moment I strike the enter key?