Thanks!

If you have to write a co-worker an email that's not too sweet, it makes it okay if you close with "Thanks!" right? For example:

Dear Co-worker:
Here's the document you requested I review.  You did this completely wrong and your writing is unintelligible.  Please see the 157 corrections I made to it in track changes.  If you don't understand something due to your own incompetence, please try to figure it out with your supervisor before calling me.

Thanks!