It is important to remember that unless you took a photo, someone else potentially owns that photo and has the rights to it. Be sure that when you photo share, you do not share a photo that has a copyright unless you have permission to share it.
Most of the time someone will care less but, it is always a good idea to ask that person by email or PM and keep that email or PM in a saved folder for future use if they forget.
If someone would use someone else's photo and they do not like it, they should simply rename or move the photo to another folder in the image host. This will move the link from where the person had it and the photo link will break and not show the photo. Problem with that is it will do the same where you linked it too.
Its going to be a mushy item until there is finally a law on a non copyrighted on line photo.
In the end try to use your own photo if possible. Less of a headache!!
Do you have a macro setting. It is usually labeled with a flower or rose looking emblem. That will allow you to get close up.