No they can't, unless that choice means that the data never arrives at Google's servers.
Do you want to share data with google to improve our products?
Do you want to pool aggregated data for benchmarking?
Both are unchecked by default.
Or do you think that google will access the data without permission? In which case, what do you base your opinion on?
No they can't, unless that choice means that the data never arrives at Google's servers.