A few facts as I see it:
Bird feeders have not only contributed to an increase in Grey Squirrels, but other pests such as Rats and Corvids (Sparrow Hawks have also benefitted from these 'eat as much as you like for free' places). Little if anything is done to educate people as to the true facts about Grey Squirrels. Most people only see a cute, furry, nut eating little animal, and a lot of the TV wildlife programmes are partly to blame for this .
Urban and semi urban areas where Greys are allowed to live in peace and provided with a year round free food supply act as a reservoir for