I'm just back from a holiday in south east Asia. All the time I was there I was getting ads on twitter targetted to the local market (in the local language) presumably based on my roaming IP.

Maybe my grasp is a bit simplistic but isn't this just intensely stupid? My twitter profile is explicitly Western European is twitter's location based advertising really just as dumb as matching IP addresses to regions?

If I were an advertiser I wouldn't be too happy about twitter claiming 'impressions' like this.