I'm not sure I agree 100% with your police work there.
I am enrolled in the class, and when I got the e-mail, my first thought was "Great. Now I have to worry about whether or not my work will look too similar to someone else's, or to the solutions that have been posted."
Granted, my first submission for assignment #2 was a third of a point short of 10/10, so maybe I don't have anything to worry about.
In the spirit of the Platonic ideal of the Academy it seems beneficial to freely share and exchange ideas.