They are hiding their Roster so that no one can Poach their players. If you look you will see that Esmark does not have their rosters up either. I also think some kids at 18U are trying to make Junior Rosters so haven't completely decided who they are playing for. I've heard of a few 18Us that are going out of state to play next year. Should be interesting when it all shakes out.
Yes, I think it isn't a hard and fast rule but it also may make a school think twice before contacting you out of the blue. I wouldn't suggest it if someone came asking my advice. Talk to several schools. If Penn State is interested in you I'm sure others are too. Play hard to get for a while and check out your options.
By the looks of things 16AAA and 16AA in Pittsburgh should be a little more competitive with Shaha dropping out at 16 and 18 AAA.
Seemed to be a shakeup on most teams at that 16U in the area.
16U AAA Looking like Pens, Esmark and Vengance should be at the upper end.
16U AA should be Mt Lebo, North Pitt and Renegades pushing the upper end of AA.