Have you guys heard about this? Apparently if you have campaign targeted to a specific geo, if you run ANY geo-modified keywords in your account containing that geo, it will map to that campaign.
Here's an example:
Campaign A is geo-targeted to SF Metro selling pizza cutters.
Campaign B is geo-targeted nationally selling pizza and contains the keyword "san francisco pizza"
Geo-parsing will serve up a pizza cutter ad to "san francisco pizza".
I noticed a LOT of advertisers are unaware of this issue.