frames hide backend (Score 1)

One useful thing about frames is that a programmer can hide complex navigation from web application users. I prefer to use 'get' calls for navigating users through web apps, which tend to make for long urls. I would rather not have a user even see this part of the application's backend. For many of the online applications I develop, there is a set flow to the pages. If a user tries to mimic one of the 'get' calls, he could cause the data to become out of sync. I could check for the proper creditials to prevent a user from navigating where he shouldn't, but I would rather save time counting on the fact that the backend is hidden well enough from curious users.