So I see that this website is tolerant of people (which I choose to call "crackpots") which have links to their own dubious work in their profile. These people even have thousands of points of reputation, but the minute you check their profile, you're baited to go to "CrackpotLandia" (such as academia.orgedu).
Is this OK with you, having reputable physicists (like Cosmas Zachos and Valter Moretti or Urs Schreiber to name a few) alongside crackpots? On Physicsforums, they would be banned (or at least the links in their profiles) the next second after joining.
P.S. It doesn't mean that all content posted on personal accounts on academia.edu is junk, but some of it sadly is.