It irritates me that so many forums and media sites allow you to edit your posts at will. There’s one site I go to that I like very much - it has a 5 minute edit window, and after that, your post can no longer be edited. You can’t change what you said, pretend you never said things, etc, once you say something it remains. It would be nice if more sites were like that. Or at least, if you edit/delete something, for there to be an option to check the history to see what it used to be, so if you try to delete some comment you made people can still check it. Whether it’s informational, or it’s because you’re trying to hide something you said that you realize was actually super shitty and people are getting angry at you for it, I prefer things to stick.