Yep, I imagine it's to do with the internets, the youtube videos spawning countless news items which can affect any transfer activity the club are working at. The power of the web is such that new controls have to be considered which may affect stuff that we've been doing for decades as par for the course, like this signing and meeting players stuff. It sucks but if it's affecting any business that is going on, you can bet they will consider these kind of measures. Especially given we have a number of transfers that need to happen to clear the books and possibly open the way for new blood, you can bet they don't want anything jeopardising any progress.
Probably once things have calmed down and there's less room for problems, ie during the season / when 99% are settled and going nowhere, then they'll lift it. I doubt they'd want to shut the kids out on purpose especially as they work fairly hard to encourage the kids to be a part of the club.