The issue here is not so much whether a pedigree should be posted, but rather, should the picture of a source be posted?
In this case, the person profile is part of a line of descent pictured in the photo of the pedigree. Well and good, that is a source. It may not be the best source, but it is a source. Whether or not the pedigree picture is posted, the source certainly should be listed.\
One problem I've found with photos of sources is often you don't get complete information. You see an important piece of information about John or George and you know it's on page 247 of some book because that shows up in the picture-- but no indication of what that source atually is or what book it came out of, or whether the author is well regarded or not. The poster is saying, "see, it's true, I found it in a book." Well, yes, but we want to know more!