lol, wtf that would break links everywhere on all clients..
Discussion
I am not sure what you mean, I just open that post in several clients and they all render the link correctly.
isn't your suggestion to not use `http://` so your client doesn't interpret it as a link and not render a preview? that would also make it not render as a link almost anywhere else for the same reason.. which didn't seem to me like what the op wanted as he refers specifically the previews but maybe it is..
I don't think it will. Modern browsers understand that most people mean to use the web when they post a link without the protocol and www.