Around 1990, NOAA began weeding out more than three-quarters of the climate measuring stations around the world. They may have been working under the auspices of the World Meteorological Organization (WMO).
It can be shown that they systematically and purposefully, country by country, removed higher-latitude, higher-altitude and rural locations, all of which had a tendency to be cooler
http://scienceandpublicpolicy.org/images/stories/papers/originals/surface_temp.pdf
All that shows is your complete ignorance of how ANOMALIES work or your complete dishonesty. Certainly, since your source pretends to be an expert there is no doubt of their dishonesty. They couldn't be experts if they don't fully understand anomalies!!!!!!!
Just as it makes no difference if the stations are in warm places when you use anomalies to determine trends, it makes no difference if the places are cooler. In a cool place the 20 to 30 year average the anomaly is measured against will lower so if the deviation from that low average is positive we are in a warming trend and if it is negative we are in a cooling trend.
The more likely reason for fewer measuring stations in remote cold places is budgetary. There are fewer people willing to man the stations in remote cold places for little or no money.
Deniers produce no data because it's cheaper to criticize those who do. Why don't you deniers man those abandoned stations at your expense and produce some data on your own???