All you need to submit a content removal request for images on Google Street View is an email address. The is no other validation, meaning you can remove anything you want to.
Well, perhaps not anything… The Albert Hall might be going too far (unless you claim to be a person in the image) but basically if you claim the images shows your house/car/person it will be removed. Even claiming on the flat above shops works.
I suppose this is due to all the controversy over privacy and Google’s desire to make removal as easy as possible. It’s certainly a good way to sabotage rival businesses by making them harder to find.