Since it launched, Yik Yak has allowed users to anonymously post messages and pictures viewable by others within their local area. Popular among students, the service has been controversial and considered by some as a vehicle for cyberbullying, and threats of violence, but now for the first time it's letting users attach their nicknames to posts. If you choose to grab a "Handle," it will be on by default for new posts afterwards, but you can choose to post without it, or continue using the service without one.