Using Google map is something people do even without thinking. And i like to share my photos of all the places (hotels and restaurant for example) they i get to know with my job.
As a matter of fact it would be useful to make distinction about the real qualifications of the people posting. And i think Google is ahead with this matter. Because you have a profile and the people see som badge or points…
For istance if i am a Travel agent i am qualifica to talk about Travel, hotels (and not architecture…)