I've come across people using photos they didn't take a few times. Some of them have stated right in the observation description that the photo was taken from Google. I'm thinking that maybe they think that as long as they state that, then it is okay. Sometimes they will show a blurry unrecognizable photo as a secondary photo and then a professional looking one as the main photo and state that they couldn't get a good enough photo so they got one from Google. I'm hesitant to instantly flag their photos and scare them off the site, since I really think they don't get what they did wrong. So I've posted a comment like the one I just did below and if they don't respond or do anything within a few days then I'll flag the photos.
I just noticed that for this observation and all your other ones, you include in the description "Images taken from google". As a new user you may not know that you can submit casual observations without any photos to document your sightings, and should not submit photos that you did not photograph yourself. Submitting photos to the site applies a copyright to them stating that they are your photos as seen here. http://www.inaturalist.org/photos/9121360
You can remove these photos from your observations and mark them as casual observations. That way they can still be used to document what you have seen for your own purposes, but they will not be verified by others or used for research purposes.
I can't recall when I first started using iNat how clearly this information was stated. I also don't use the app to submit sightings and was wondering if information about proper photo use is prominently featured there? The fact that some of these people are clearly stating that the photos are not theirs makes me believe they are not trying to deceive, and just don't understand proper photo use.