UPDATE: The email that goes out now when you create a session no longer requests participation from colleagues, it just mentions that you have created a session. Thanks to Academia.edu for making this change.
I’m not seeing a lot of discussion about this so I thought I’d flag it up. Academia.edu unevenly implemented a new “feature” called Sessions that randomly invites a handful of colleagues to comment on your uploaded work. I was confused and embarrassed when this happened to me the other day–there is a very small tick box when you upload your paper that you must untick on this page:
If you fail to see it and untick it, you get a lot of confused responses from your colleagues who probably have better things to do than comment on your academic shenanigans. If you’d like an example of this, check out this session on a very brief book review I wrote several years ago and just now got around to uploading:
https://www.academia.edu/s/e1783e3d6e
It shows what an incredible star Angela Piccini is, and how much confusion that this thing generates.
All of this happened when I put up a pre-print of a new paper on archaeological filmmaking in Public Archaeology. You can can download the f’reals, paginated version with images Open Access here:
http://www.maneyonline.com/doi/abs/10.1179/1465518715Z.00000000077
Archaeology and the Moving Image
Archaeological filmmaking is a relatively under-examined subject in academic literature. As the technology for creating, editing, and distributing video becomes increasingly available, it is important to understand the broader context of archaeological filmmaking; from television documentaries to footage shot as an additional method of recording to the informal ‘home videos’ in archaeology. The history of filmmaking in archaeology follows innovations within archaeological practice as well as the availability and affordability of technology. While there have been extensive analyses of movies and television shows about archaeological subjects, the topic of archaeological film has been characterized by reactions to these outside perspectives, rather than examinations of footage created by archaeologists. This can be understood to fall within several filmic genres, including expository, direct testimonial, impressionistic, and phenomenological films, each with their own purpose and expressive qualities. Footage taken on site can also be perceived as a form of surveillance, and can modify behaviour as a form of panopticon. Consequently, there are considerations regarding audience, distribution, and methods for evaluation, as these films are increasingly available on social media platforms. This paper explores the broad context for archaeological filmmaking and considers potential futures for the moving image in archaeology.
Colleen Morgan 
I had the same embarrassing situation happen to me! Though it did result in a pleasant exchange of public archaeology stories, I made sure to uncheck the box on all other uploads.