You seem to be confusing two things.
1) Children inheriting some of their parents' status.
2) Children being able to speak on behalf of their house.
I think you are bringing "parents" into this unnecessarily. If there were Gryffindor noble chambers, I doubt anyone would deny one to Harry on the grounds that he was an orphan. Conversely, if a hypothetical Malfoy of lesser parentage (a cousin X removed, perhaps) were to enter Hogwarts, I doubt they would be denied noble chambers because their parents were low down within the Malfoy hierarchy. For as long as they bore the Malfoy name, any discourtesy to them would be considered an insult to the House of Malfoy.
It's not about inheriting parents' ...
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 98. The previous thread is at nearly 500 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, 20, 21, 22, 23, 24, 25, 26.
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: