I'm a CS student in charge of managing the workstations around here, some of which are Linux. And my reaction to this is: "WAT."
Just because something is in an official repository doesn't mean I'm totally okay with it being on my computer and my network. A clever student could manually compile some of those programs I specifically chose not to install, but if they need to be setuid (which a lot of the iffy ones do) then that won't help them much. If someone can be trusted to install software at a whim, then why aren't they already a sudoer?
Now it happens that I don't run Fedora on anything, but I *know* that a lot of admins of Linux workstations out there are not even gonna realize this is enabled till it bites them somehow. It totally goes against the principle of least surprise, as it's not expected behavior at all.