You still can, Mitchel - what if you have a different approach to it? 
On a serious note. What's really missing from this whole thing is an aggregate screen for this set up. In many cases, of course, the entire set up is either Login/Shopping Cart or just the whole site. However, often you'll find that just the secured area needs to be secured :) - I mean the one protected by Login... And it would be a pain to go a set each and every page...
If you, guys, have nothing else to do, may be you can come up with a sql statement one could execute to bulk set it. Although, a screen akin to Admin - Tabs, or a mod to that very screen, woudl be a better approach.