I wouldn't be mad, I would just choose to take my business elsewhere. First of all I do not trust Facebook in any way and would no longer trust my bank if they

I wouldn't be mad, I would just choose to take my business elsewhere. First of all I do not trust Facebook in any way and would no longer trust my bank if they trusted Facebook. FB does not have any kind of obligation towards me (at least none that they're willing to uphold, even if it means bending or breaking the law). I consider banking to be a critical service to me so I personally wouldn't want them to have anything to do with my bank. Second of all FB and the bank could at any time share data that would negatively impact me and we already know there are no negative consequences to that as far as the companies are concerned. And lastly, my bank using this even as an opt-in sets the trend and suggests their intentions in the future. Continuing to use it means endorsing the behavior. Like buying software from a company that also sells to oppressive governments. If I have a choice I avoid it.