I recently started up a new YSM campaign for one of my UK sites - www.homebrew4u.co.uk - which is wholly focused on UK people. Not long after starting I noticed that my adverts were displaying on sites such has www.excite.de and www.excite.it. I could not find any way to turn this off in the control panel, so I contacted them to find out what was going on.
I asked YSM why my adverts are showing up on non-UK sites, they said that they dont, indeed :
We would like to inform you that when you have a UK account with Yahoo! Search Marketing your adverts will be shown on the UK and Ireland sites.
I therefore countered this by giving them the URLs of non-UK sites that are showing my adverts, and they came back :
We would like to inform you that when you sign up with Yahoo! Search Marketing, you sign up to display your search listings in Yahoo! Search Marketing's search engine and in all of our partner search engines.
Please note that unfortunately we cannot cancel the display of your search listings on any of the smaller search engines as you have listed.
Either that is just plain stupidity or a major technical error!