No, by most accounts they were angels, without argument. Perhaps you misunderstand about angels, that even satan can appear as an angel of light, because God created him as an angel, and there are others as well. However in both those cases those angels came bearing false witness and testimony, attempting to change the word of God and finding eager subjects in Joseph Smith, who was quite involved in masonry and things of that nature.. Mohammad who was angry the Jews and christians rejected him, among other things... Demon may be a term some people use to refer to the angels that rebelled against God, but demons seem to take lots of other forms as well, from various accounts I've read or encountered. No one in this life really knows all the specifics.

The angels I know for sure have been around us have never offered 'revelation' of any sort contrary to the word of God, they pretty much just protect us, deliver our prayers back and forth to God quite quickly, and return messages from the Lord when need be... the angel in the photo of the praise service seems to be exactly that... an angel of worship... By their works you shall know them. Read the bible for more clarification, it's a rather involved subject.

And otherwise, you can think whatever you'd like, it really doesn't matter to me, they are just photos with what appear to be apparitions of some sort in them. Only firsthand experiences can really ever teach you the truth about these things and I can't help you with that, sorry. Context itself is also important, and chances are quite slim you will ever know me so you'll have to be satisfied with the bits and pieces of my life experience I throw out there.

It's kind of the thing you really have to ask Jesus about, not me. I just have a couple photos to show, believing is up to you. It's really neither here nor there to me what you believe to be completely honest. I gave up trying to convince people of anything a long time ago. If someone believes, the photos are meaningful, if not, so what... that's all.