At my work it’s just an intranet with no outside email access. Only the store manager has that. You also are not allowed to plug in USBs to anything. So if you want something printed that was not emailed on the Interoffice mail, you have to email it to the store manager.
Facebook was fine at first. I remember excitedly hearing that my school was added to the list of approved schools to get a Facebook account.
Not sure if problems started when it was expanded beyond just listed colleges, or if it was just the public stories or wall or whatever it’s called.