I don't think you need to be an expert in the human mind to realize that an opt-out for Microsoft Recall is going to lead to a lot of people getting tripped up by it in a sensitive situation (perhaps, one involving security).

If it is going to be there at all, this should be an opt-in instead.

I'm also wondering whether it shouldn't be implemented in some other way, and if there shouldn't be some API or something for a program to opt out of it? #privacy