There are some students who are free and can work out answers for a paper,
well we can publish them on FEP as model answers or something (and we can also mention, that this is paper is solved by ____)
we will not take guarantee whether it is right or wrong, but we can publish them, so others can learn some methods and stuff.
I cannot convey my idea clearly, but in short, we should allow students to submit solved papers over here, as it can benefit others.