Be creative and adventuresome, but treat this all professionally. I can see that a lot of people have personalized screen names – not too surprising if you already have an online presence! BUT do not expect other people in the class to know who you are. I can guess because I’ve known some of you a long time, but other students might not know who is responding.
Therefore, if you are using a personalized screenname in which your legal name is not obvious please sign your posts with your first name and last initial.
Transparency is important in professional communication.