Troll messages are going around based on the latest optout link niantic has sent out. If you have received such messages such as to fill a form to opt out from faction change or get a bonus or whatever, *DISMISS*. This is *FAKE* and will destroy your ingress account.
Niantic has recently gone independent from Google and thus is advising people that privacy based on the past agreements will not apply in the future. Thus if users are not comfortable on niantic having gameplay information and email address can opt out from being in the database. However such an action can lead to a deletion of the game account and account information in Niantic's database.
Recently troll messages have been circulating around scamming users to opt out from a faction change, or to get a bonus by filling up a form, which will be linked to the above official niantic's opt out form. thus deleting the account entirely. Such an example is stated below -
Dear Resistance Agent,
Due to balance issues between the number of Resistance and Enlightenment agents, Niantic has decided to automatically change the faction of a percentage of Resistance players, chosen randomly. This move will restore the balance and keep the game fun to play for both factions.
You were selected by our system and will be turned into an Enlightened agent on or before September 11, 2015.
If you wish to keep playing as a Resistance agent, please log in to your Ingress account, go to <linkremovedsoyoudontclickit> and click the button marked "No Transfer". Otherwise, you will become an Enlightened agent on or before September 11, 2015._
The Niantic Team
This is indeed *FAKE* and thus please advise communities that you have contact with to refrain from actioning on such messages.