This represents a small part of what IT is worried about. Offer a beer and say the word "SharePoint" if you want the long version of where this could wind up.

The issue isn't letting end-users add features. The issue is twelve end-users customizing something that produces output, saving it, and now nobody can read it.

This can get solved. If it even gets a chance to gain traction (it should, though IT will of course push back). But let's not pretend we're there yet.