Re: Not all bad
Except the reason the walls are spreading isn't their features - it's the nature of the users. You can actually do most of the things "superwall" and it's ilk can using the normal wall now - pretty much any developer can allow a wall post with content from their app. Unfortunately it doesn't stop the people who have 3 or 4 of these things.
Luckily, they're almost exclusively used for chain mails, so you can safely do like me and block them (that also stops the invite requests).