So ok, you probably don't have a twitter account. Ok, you're one of those people that prefer RSS feeds for everything and you know what? There's nothing wrong with that. I mean you could use the twitter api and get the rss feed for it (http://api.twitter.com/1/statuses/user_timeline.rss?screen_n... would be the one for this particular twitter account) but that's not the reason why you don't like this format.
Apparently the reason you have such reservations for this twitter account is because there's a "lack of context" or "140 chars is too limited". With the lack of context I agree it's a bit of a problem but It's not anything that a simple google search can't find. Plus, in many cases you don't need any context. These quotes can be self contained without knowing when and which thread they were said. These are quotes which are likely to pop up in any HN thread.
As for the "limitations" issue, I don't see the problem. What do you expect? A huge essay on why a quote is silly? As far as I can see, the format that the creator has chosen and has displayed works pretty well. I can't think of anything else that could be added to it or any problems coming from this because of "limitations".
The twitter format doesn't work for you. We see that. That doesn't mean that this is a "poor execution" and that it could be improved. Not everything should be the most perfect execution. Sometimes something as simple as a twitter account works and it's clear that from some of the posts in this thread, that it works fairly well.