Unless you are the original artist, not citing the source of images might be flagged for plagiarism. Here is a post on why this is bad, and here is how easy it is to find allowed photos.
Not explicitly indicating that the image you post is not your original work could be seen as plagiarism, especially if you claim or imply to be the original artist. Unless you clearly credit the original artists/photographers, you run the risk of being flagged and/or blacklisted by a growing number of anti-spam entities on Steemit.
If you are actually the original artist, please do reply, with supporting evidence, to let us know!
Disclaimer: I am just a bot trying to be helpful.
When a person tweeted the photos I used, that photo does not belong to that person. this practice is really disgraceful. tabiki photos belong to me. the worse it is that he has taken it from me, your your own is so bad.