uhm, far from the techincal aspects...
isnt it frowned upon to film people without asking them before?
here in germany, i would have had a very bad feeling, shooting those scenes
i'm pretty sure germany has nothing to do to make people frown

as you know, andrew raid shooting in berlin and there're a lot of people in his films on streets he never asked permisson
being in public place you can film what ever you want in most countries
i don't have spy camera

6d with VF and usually 2.8 lens looks like a monster and people see me filming them, when i see (rare) they getting frown, i just stop record and usually delete this shot