All they will capture here will be alias of innocent people's details
Well yes, but that's the myth of big data - the illusion that mass collection of so-called "atmospherics" will show what I refer to as "disturbances in the force", patterns of anomaly. There's this deluded train of thoughts that, given enough data, you can detect things as if they were a sort of Twitter trend, even without having feeds that bear at least some relation to the information sought.
They can have the data on my devices - what I leave there has been culled from public sources so it's no news, and it doesn't offer new meta data. I deal with sensitive enough issues that I know how to create plausible deniability.
I am hoping that soon, every airport outside the US will start interviewing US officials. After all, it would only be fair reciprocity and we now know none of them can be trusted..