Okay, in a very strict sense it does make it harder to access. Harry was unlikely to get permission if he asked before, and now he's more unlikely to get permission.
He still has a time-turner and the Invisibility Cloak. If he can get behind a stack long enough to put the cloak on and take it off, he can defeat 'keep an eye on him'.
Now, putting a door on the restricted section would actually provide a hindrance, but would also tip him off that there were probably new wards.
Tangent speculation: What are the odds that Harry will find the Room of Requirements and learn about its nature and then determine the limits of its capabilities?
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 90. The previous thread has passed 750 comments.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,18,19.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: