Delete your own message
It would be very nice, if it's possible to delete your own message in the chat. It happens sometimes that you write something what sounds pretty good in your mind, but if you read it in the chat after sending it, you recognize that it wasn't such a cool Idea to post it or you mention by yourself that your message is stupid and want to delete it. A cool way to implement this would be, if you add a little bin between the own message, that you can easy delete it by clicking on them.
I think its a very bad idea, it would just enable more trolls (people who say bad words), they would type "it" in chat, then delete it right away and I do not support this behaviour.