As anyone (that I think of) would agree, a beautiful frame gives something extra to a painting or a picture. It also does something else. It fools you. Let me explain. Any kind of frame instantaneously draws the attention away from the quality of a work. If for example in an art gallery there are a couple of hundreds of works and only one that has a frame, you would be drawn to the one with the frame, irrespective of the quality of the work displayed inside it. Of course, you wouldn't expect an exhibition to use a large and impressive frame in a mediocre work, because you would expect them to chose to emphasise specific works of special interest for you, out of all the works in the gallery.
What about frames in dA photographs, then? Some excellent photographers are using modest framing in some of their works that they consider to be special. The same applies with the rest of us, amateurs/enthusiasts. If someone considers a piece of their work to be special, why not add a thin black frame around it? I don't, though, and I'll tell you why.
In DeviantART browsing through the deviations is like browsing through an art gallery. The works that are framed draw more attention, but there is no one there to tell you that your experience in museums and art galleries is not applicable here. Anyone can add a photoframe and pretend that his mediocre work is a dA masterpiece. Some have even gone as far as not to even distinguish between their own works. They stick a frame to every single one of them. Don't get me wrong, frames usually do look nice and uploading your work on dA is not like taking part in a competitive sport (at least for most). You can even treat your profile as a personal portfolio that just happens to be included in a huge art gallery. The problem is that when you make yourself part of the community. I've become skeptical of pictures with fake frames and I'm more critical of their content when I see one. I think the funniest cases are horrible underexposed sunset shots from lousy mobile phones in elegant template frames. "A fave for you sir, for showing us the frame someone else made in order for you to insert a lousy shot in it". Even worse, I would feel like I treat myself as a someone really special if I treated my pictures as more important than some of the best (or more popular) unframed photographs in dA, so I choose not to.
This is how it looks when you add a frame in something lousy, when compared to some of the most popular works here:
Which is the odd one out?
At least, if someone choses to do it, he has to have the decency to frame his best works, the ones that really make him proud for taking them and the ones that he thinks others will also appreciate. Just don't overdo it. No one likes an undeserved show-off.