Need to spice up your question? Try using two question marks back-to-back. Papergirl covers the double question mark issue with her blog post “Questionable Punctuation.” She totally hits the nail on the head with the tone differences between using one question mark versus two. Really. Read the blog post.
The thing I have to contribute is what happens when you use nine question marks? Oh, you can read the comments on that blog post to find out.

i like to use “?..?” It signifies a slight pause before questioning again, for those “W…TF?!” moments.
i like to throw around question marks like a tennis ball throwing machine on super-fast-hyper-drive speed.
How funny, I saw this on your fb before I saw it here. Maybe the tide is shifting! You know how I feel about the interrobang which is my preferred punctuation when a double question mark might be an option
Tom when have you not been the master of the interrobang‽
So I can be the master of the interrobang and papergirl can be the master of the double question mark! ;O)