I'm confused enough already

It's funny. While I generally like to capitalize properly when writing, I rarely do in instant messages. I'm not sure why — it's almost like IMs don't deserve it. However, I'm pretty good about using punctuation. I think punctuation is important, but I'm sure there's lots you can get away without there as well.

However, if you're going to forgo punctuation in IMs, I beg you to keep one: the question mark. No piece of punctuation changes the meaning of a phrase or sentence more dramatically.

For example:

• you reviewed the document.
• you reviewed the document?

It matters. Come on, help me out here — I'm confused enough already!