I don't know whether this question fits well for meta or not,
But I would like to draw staff's attention to the fact that, solutions to many psets or I should rather say most part of solutions are innocently posted by our new users on the site. Ofc, we can't expect them to know all the rules of using the site at once.
Other users on SE can't help at that level because even editing the question does not remove its history completely from the site, so one can easily find answers on
Also, since most psets don't change each year(I read that somewhere on facebook group), then SE can become a good spoiler especially for the students who are going to enrol in next and upcoming years.
Is staff planning to change all psets each year so that this issue can be prevented or something else like removing the edited versions of the questions so that no one else can exploit them in future?