All undergraduates know that they will soon be at least graduates, if not later postgrads. The transition is inevitable.

Any kind of stratified internet community would have to have the eventual prospect of transfer from one strata to the other, as an inevitable consequence of good/bad participation.

As soon as it becomes set in stone, or the transfer becomes a deliberate choice rather than an inevitable consequence of behaviour, I think people will forget about the criteria that originally divided them and slowly regress to hatred of the other.