What's The Deal With Alumni Junction?

So I periodically get emails from 'Alumni Junction' that my high school classmates have posted messages for me on their site.  It is specific classmates by name that I remember, but either a) it's someone I've never spoke to, so I highly doubt he or she is contacting me or b) it's someone who could contact me on facebook, so why is he or she writing me on a random site instead?

Anyhow.  I keep getting these emails.  I went to their site.  I know these 'messages from my classmates' must by lies.  I attempted to login - I clicked 'forgot password'.  It emailed me my 'password'.  Let's just say I'm, for better or worse, too much of a creature of habit - this is not a password I'd choose.  I found it odd that it sent me a password, instead of telling me to create a login/account.  As I started to think about it, I had no recollection of ever being at the site and creating an account (not that it is something so noteworthy that it'd stick out in my mind, but still).

I know there is some kind of sham here.  I am not sure what, exactly, and I do not want this blog to be sued for libel.  So, I do not have any hard evidence, nor am I making a direct accusation, but something seems off.  Does anyone know anything about alumni junction?  I did a brief google and I found someone discussing, on his own blog, in relation to his upcoming high school reunion, that he directly spoke to someone who 'posted a message to him on alumni junction' and she directly told him that she had not.   Your thoughts?  Anyone have more information?  Any alumni junction users out there?