Ungrateful bunch aren't they. Sort of reminiscent of Okinawa or the Philippines grumbling about our military presence. 
Guam should hold an island wide referendum and go with whatever the electorate wants. I'm all for independence for any territory that isn't happy with the US. Seems to me they have most of the benefits of being American and none of the bad things such as taxes. Voting matters little since they have so few people, they would less influence than Hawaii with it's 2 electoral votes.
Stupid people often don't realize what they've got until it's gone. They should go ask the Filipinos if they miss Subic naval or Clark air Force Base.