+1 to leaving the sticker alone. Some of my guitars have them, some don't. However, it does add just a little bit to bolster the impression that previous owner(s) appreciated a guitar's original state.
BTW: Being that an omission on the sticker was mentioned, I figured that I'd post this G&L blooper. While I'm not the type of guy that gives people grief over spelling errors on internet posts, as so many of those are just pure typos made in haste, when professionals do it, it's another story. Check out this G&L ad that someone was selling on Ebay a few months ago. As evidence of poor proofreading, it is "unparalled". It looks like the ASAT has the "by Leo Fender" sticker on the headstock, indicating that the as was from around 1988 or so. I guess it was going around back then.