Hi Matthew,
Generally, anyone has the right to take photos and videos of public places and the people within them, unless you are filming in a way that is offensive or causing a nuisance to those around you. In addition, the
Privacy Act 1988 does not cover individuals acting in a personal capacity.
I don't know what state you are in, but in Queensland for example a person has the right to film in public, except:
1. Where a person is making indecent visual images of a child under the age of 16;
2. Where a person is committing an indecent or offensive act in public;
3. Taking of prohibited visual recordings of adults;
4. Where the person is being a public nuisance whilst filming; or
5. Where the person is obstructing police whilst filming."
There is specific legislation regarding the use of surveillance cameras in NSW, however it generally just restricts the use of surveillance cameras to film other private property and in situations where police have warrants to do so etc.
Assuming that bus stops and shelters are considered "public property" there could be basis there for a complaint of public nuisance, however you would need to establish you had standing to bring such an application. You could bring it up with local authorities and see what they say.