Thanks for your replies. It is not that much about where I live, but more about habits etc. Some random examples I can think of: your boss knows you had an interview at another company, burglars know you’re on holidays, getting tracked for advertisement, insurance company sees that you’re doing some dangerous sport… (Facebook etc. is no better, but then it is more obvious that you’re sharing this information)
Maybe in the end it is a good thing as it helps in not having too much useless data uploaded (e.g. the same road every day).
On the other hand it might be of interest to Mapillary to provide some kind of anonymizer to get more images.
Anyway, now I know what I can do if I’d like to upload images, thanks !