netmeg - 6:47 pm on May 27, 2013 (gmt 0) [edited by: netmeg at 6:48 pm (utc) on May 27, 2013]
netmeg, are you suggesting people are circumventing google's geotargeting and clicking ads within regions that are not targeted and therefore should never have been shown the ads? From my testing google does a very good job keeping ads targeted, even with cities close together.
Happens all the time. Geo-targeting is never 100% on the display network. Lots of people use proxies. And many advertisers (specially the less-than-expert ones) don't bother to geo target at all, to their vast detriment.
(I have a lot of experience with AdWords, moreso even than with AdSense. There's some as would call me a bit of an expert)
It's perfectly fine to block countries from seeing your site or your ads. Whether it's wise depends on your situation, but Google isn't going to slap you down because of it.
[edited by: netmeg at 6:48 pm (utc) on May 27, 2013]