CTRL+Enter is the natural shortcut for "Send" in case of multiline input fields. Stackoverflow, for example, supports that shortcut for publishing comments and answers. Some messengers do. But social networks don't. Not a single one - Facebook, Twitter, Google+, LinkedIn - all of them require you to go and press the "post" / "tweet" / "share" button with your mouse. I wonder - hasn't it ever occurred to them that it is a useful shortcut that at least some tech-savvy people will prefer? You would expect that programmers that work in these companies and use the services would actually think of this and implement it (it's really simple). Or is it just me thinking that CTRL+Enter should be supported by social networks?