Even though it's apparently technically legitimate, one of my biggest pet peeves is the use of the word "itch" as a verb, as in "he itched the bug bite". Blech. I double over and cringe in disgust. You scratch a bug bite, or an itch, or anything similar. You don't itch it. The itch is what you scratch. If you can just follow that one simple request, we'll get along fine.
(Please note, because of the time that has passed since I wrote this article, it may no longer reflect my current views or the most accurate and complete information available on this subject.)