Thanks. And I have a feeling that it would be much worst (aka better) for a mail.google.com inbox page, even if you keep the useful Javascript. But their javascript is so obfuscated that it is not too easy to test. One time I extracted a simple feature for gmail's javascript... it was fun (probably would be easier for a programmer though)
This is false for comments... it is true for posts however.
Also, reddit once said that they only keep the latest version of a comment in their database (not sure if it is still true though).... so if you want to really delete a comment from reddit, you have to edit it to some random text and then delete it.